Posted by **kim** on Wednesday, June 10, 2009 at 11:01am.

Simplify: Can someone please help me with this and go through the steps for it please. Thank You

-8z(-9z^2-z-1)

- prealgebra -
**MathMate**, Wednesday, June 10, 2009 at 11:05am
Start with the distributive law:

A(B+C)

=AB+AC

and similarly

A(B+C+D)

=AB+AC+AD

Try:

4x(5x^{2}+3x+2)

=4x*5x^{2} + 4x*3x + 4x*2

=20x^{3} + 12x^{2} + 8x

Can you try your problem now?

- prealgebra -
**kim**, Wednesday, June 10, 2009 at 11:15am
i still don't understand on how to do the problem

- prealgebra -
**kim**, Wednesday, June 10, 2009 at 11:19am
would the answer for the problem that i sent you be 72z^3-8z^2-1

- prealgebra -
**PsyDAG**, Wednesday, June 10, 2009 at 11:34am
You have to multiply -8z by *all* terms. Also remember that a negative times a negative equals a positive.

72z^3 + 8z^2 + 8z

I hope this helps a little more. Thanks for asking.

- prealgebra -
**Kimberly**, Wednesday, June 10, 2009 at 3:28pm
simplify:

can someone please help me solve this problem?

Thank You

(2k+7)(7k-1)

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