prealgebra
posted by kim on .
Simplify: Can someone please help me with this and go through the steps for it please. Thank You
8z(9z^2z1)

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? 
i still don't understand on how to do the problem

would the answer for the problem that i sent you be 72z^38z^21

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. 
simplify:
can someone please help me solve this problem?
Thank You
(2k+7)(7k1)