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# Feedback Q&A on Algebra

by Ron Kurtus

Readers have sent in a total of **69** comments and questions on Algebra issues. They are listed according to date.

You can read them to further your understanding of the subject.

## List of most recent 10 letters

## Topic |
## Title |
## Country |

Product of Two Negative Numbers is Positive |
Puzzle question | India |

Product of Two Negative Numbers is Positive |
Product of Two Negative Numbers | India |

General |
Solving single variable equations | India |

Multiplication with Exponents |
Multiply terms with different base | USA |

Division with Exponents |
Raise number to the zero power | Canada |

Variables and Constants |
Solving a problem | USA |

Purpose |
Why are letters used in equations? | Nigeria |

Variables and Constants |
Formula without constant and variable | UAE |

Variables and Constants |
Is zero a variable? | India |

Multiplication with Exponents |
5^6 times 8^6 | USA |

## Puzzle question

Topic: **Product of Two Negative Numbers is Positive**

### Question

January 1, 2019

which is that eight digit grid whose three cosecutive numbers is even number and whose sum is nineteen

Note:-there is digit 6 at eighth place when we move from right to left and also digit 6 at seventh place when we move from left to right

Bashir ahmad - **India**

28902

### Answer

That problem seems like quite a puzzle. I am sorry but I do not have the solution to this problem.

Best wishes in finding a solution.

## Product of Two Negative Numbers

Topic: **Product of Two Negative Numbers is Positive**

### Question

May 5, 2018

why we take x= ab+(-a)(b)+(-a)(-b)=ab

because (-a)(-b)is already a question to proof

MANISH - **India**

28544

### Answer

(-a)(b) = -ab

(-a)(-b) = +ab

ab + (-ab) = 0

Thus ab+(-a)(b)+(-a)(-b)= ab

## Solving single variable equations

Topic: **General**

### Question

March 31, 2018

If k is constant can we find solutions to single variable equations

Vidi - **India**

28493

### Answer

"k" will be involved in solutions to the equations. See: Solving an Algebraic Linear Equation with One Variable for information.

## Multiply terms with different base

Topic: **Multiplication with Exponents**

### Question

November 3, 2017

I need to find out how to multiply terms with different base and exponents but i looked online and nothing shows up something like this. XY* in a radical multiplied by x*y to the third power inside a radical. Please help it feels hopeless right now

Lester - **USA**

28307

### Answer

I'm not sure I understand what you are trying to do. Are you trying to multiply something like (2^3)(5^2)?

## Raise number to the zero power

Topic: **Division with Exponents**

### Question

October 16, 2017

(3x^-3)^0

Does the exponent -3 x 0 = 0?

Jonathan - **Canada**

28290

### Answer

Any number raised to the zero power equals 1. For example x^0 = 1.

Thus (3x^-3)^0 = 1

## Solving a problem

Topic: **Variables and Constants**

### Question

March 28, 2017

kindly solve for me an algebra problem that is similar to the problem below and give me a step by step procedures:

b=ka+3, k is a constant, if the possible solutions are in the forms (a, b) is (2,3) a solution to the equation?

moifee - **USA**

27967

### Answer

What are you trying to find a solution for? a, b, or k?

If a = 2 and b = 3, then 3 = 2k + 3, and k = 0. But I don't think that is what you are looking for.

## Why are letters used in equations?

Topic: **Purpose**

### Question

March 11, 2017

why did they choose to use letter of alphabets or other symbols as a subject of the formular when numbers can still serve and is even easier to be used in rounding up calculation?

Chidi - **Nigeria**

27935

### Answer

Numbers are used in specific cases. The letters of the alphabet are considered variables, such that the equation or formula can be used with any numbers.

See Variables and Constants in Algebra for an explanation.

## Formula without constant and variable

Topic: **Variables and Constants**

### Question

March 1, 2017

Using formula without constant and Variable is right or wrong.(4-9/2)square 2 please clear it.thanks

Jamil - **UAE**

27918

### Answer

Just having numbers in the expression is simply an arithmetic exercise. What you have written is (4 - 9/2)^2, which would be (-1/2)^2 = 1/4.

## Is zero a variable?

Topic: **Variables and Constants**

### Question

February 13, 2017

0 is variable or constant

Chandra - **India**

27877

### Answer

Since zero (0) does not change, it is a constant and part of the number system.

## 5^6 times 8^6

Topic: **Multiplication with Exponents**

### Question

January 31, 2017

hi, i have a question that is 5 to the 6th power times, 8 to the 6th power... how do i do this i asked everyone and they don't know how

thank you

noelle - **USA**

27847

### Answer

5^6 (5 to the 6th power) times 8^6 = 40^6 (40 to the 6th power).

(5^6)*(8^6) = (5*5*5*5*5*5)*(8*8*8*8*8*8) = 40*40*40*40*40*40 = 40^6

In general, (x^a)*(y^a) = (xy)^a

## Summary

Hopefully, this reader feedback has helped provide information about Algebra issues.

Always do your best

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## Feedback Q&A on Algebra