How do you solve z( 6z - 5) ( z + 5) = 0z(6z5)(z+5)=0?

1 Answer
Nov 11, 2017

distribute zz then foil

Explanation:

z(6z -5 )(z+5) = 0z(6z5)(z+5)=0

distribute z to the first parentheses term

6z*z = 6z^26zz=6z2

(6z^2 -5z)(z+5)(6z25z)(z+5)

now we foil ( First - Outside - Inner - Last)

F
6z^2*z = 6z^36z2z=6z3

O

6z^2*5= 30z^26z25=30z2

I
-5z * z = -5z^25zz=5z2

L

-5z * 5 = -25z5z5=25z

Now we just bring like terms together keep in mind the signs
and the final answer should be

6z^3 + 25z^2 - 25z6z3+25z225z