Posted by **Ms.Ellis** on Tuesday, July 26, 2011 at 4:03pm.

Reiny can you show me how to check this problem.

5a^8-20a^7-25a^6

=5a^6(a^2-4a-5)

=5a^6(a^2-5a+a-5)

=5a^6(a(a-5)+1(a-5)

=5a^6(a-5)(a+1) (answer)

- Math -
**Henry**, Wednesday, July 27, 2011 at 3:06pm
The GCF is always = to 0r less than the smallest coefficient:

GCF =< 5.

When a variable is involved, choose the

common variable of lowest degree(smallest exponent). All of this has been properly done.

Answer check:

Perform the multiplication; the product

should be identical to the expression

that was given.

5a^6(a-5)(a+1) =

(5a^7-25a^6)(a+1) =

5a^8 + 5a^7 - 25a^7 -25a^6 =

Combine like-terms:

5a^8 - 20a^7 - 25a^6.

Your answer is correct!

## Answer this Question

## Related Questions

- pre calc - factor ((5a^2+12a+4)/(a^4-16)) / ((25a^2+20a+4)/(a^2-2a))
- Reiny - Reiny I think I have found out the rectangle problem. Could you check ...
- Algebra-Can you please check this Reiny - Can you check this: x^-3y^2/x^2y^-4 I ...
- algebra last post - I appreciate the help. i take the class online and we get 70...
- Reiny and steve do this for me please - 1. Consider the functions f(x)=1/(x)+4 ...
- reiny - How do I find a variance for a set of numbers {1,16,8,17,12} I got that ...
- To Reiny - Reiny could you please check my Calculus post below, it says Calculus...
- Reiny or Steve could you check my Math? - 1. (9m+6)+(-5m-6) my answer: 4m 2. (3r...
- 7th grade-Algebra Worth Problem - Please show equation and solve for the ...
- Algebra - Hi! I just want you to check if my answers are correct. Factor the ...

More Related Questions