Question

(2x + 2) (5x - 5) = 0

Answer 1

Wait, solving or distributing?

Answer 2

its solving quadratic equations

Answer 3

Set each equal to zero then. That'll give you two x-values.

Answer 4

what?

Answer 5

Plug in each number starting from 0 and working up into x until the result is 0. That how I get it done fast.

Answer 6

(2x + 2) (5x + 5) = 0
10x^2 + 10x + 10x + 10 = 0
10x^2 + 20x = -10
there someone else can help from there /)_-

Answer 7

could you do this for an example because i dont get what your saying

Answer 8

Ok so you have, (2x + 2) (5x + 5) = 0
Lets say x=0 and plug it in.
(2(0)+2)*(5(0)+5)=?
Do that and you get, 10.
10≠0
So change x=0, to x=1 and plug it in: (2(1)+2)*(5(1)+5).
Do that and you'll find out that it results in 0.
0=0
so, x=1.
@vausvega

Answer 9

okay thank you

Answer 10

z^2 - 6z - 27 = 0

Answer 11

XD just do the same, start by replacing z with (0) or 0, and go up from there until the left side equals the right. (If the answer is above 10 or 20 you might need a better way of doing it.)

Answer 12

the answer choices say:
a.) z=3 or z-9
b.) z = 3 or z = -9
c.) z = 3 or z + -2
d.) z = -3 or z = -9

Answer 13

Guys.. if you're solving just do this ._.
\(2x+2=0\)
\(5x-5=0\)
And solve..

Answer 14

No need to multiply it back out >_>

Answer 15

O.o yea try ^his solution with this kind. I tried and couldn't figure.