answersLogoWhite

0

x2 + 7x = -2X2+6

3x2 + 7x -6 = 0

(3x-2)(x+3) = 0

Either 3x-2=0

or x+3=0

Either x=2/3

or x=-3

Plug the numbers into the original equation to check.

(2/3)2 + 7(2/3) = -2(2/3)2 +6

4/9 + 14/3 = -8/9 + 6

4/9 + 42/9 + 8/9 - 54/9 = 0

0=0

That one checks out. Let's try the second one.

(-3)2 + 7(-3) = -2(-3)2 + 6

9 -21 = -18 + 6

9 -21 +18 -6 = 0

0=0

The second one checks out also; so both answers are good.

Answer: x = 2/3 or x = -3

User Avatar

Wiki User

13y ago

Still curious? Ask our experts.

Chat with our AI personalities

TaigaTaiga
Every great hero faces trials, and you—yes, YOU—are no exception!
Chat with Taiga
RossRoss
Every question is just a happy little opportunity.
Chat with Ross
LaoLao
The path is yours to walk; I am only here to hold up a mirror.
Chat with Lao

Add your answer:

Earn +20 pts
Q: X2 plus 7x equals - 2x2 plus 6?
Write your answer...
Submit
Still have questions?
magnify glass
imp