Question

Simplify each side as much as possible, then solve the equation:

2x(x + 5) = x(x + 2) − 15

Answer 1

So far I have:

\[2x^2+10x=x^2=2x-15\]

Do I remove the = sign?

Answer 2

isolate the variable x

Answer 3

+2x, not =2x

Answer 4

I know the factors are:
1,2 & 3,5...I just get confused on which one should be negative.

Answer 5

2x^2 + 10x = x^2 + 2x - 15
subtract x^2 from both sides so you get x^2 + 10x = 2x - 15
then subtract 2x from both sides and add 15 to both sides and u get x^2+8x+15=0

Answer 6

what are multiples of positive 15 that when combined will equal positive 8?

Answer 7

3 * 5 = 15
3 + 5 = 15
so you rewrite equation to look like this (x+3)(x+5)=0

Answer 8

make both equal to zero and solve for x.
x+3=0
subtract 3 from both sides and u get x=-3

x+5=0
subtract 5 from both sides and u get x=-5

your answer is x=-3 and x=-5

Answer 9

thaaaank you, next question

Answer 10

you're welcome, ok lol