Question

Solve 2x2 + 12x= 10
answers:
-3+-√14
-3+-2√2
-3+-√19
-3+-√29

Answer 1

ok so lets start this out simply.

Answer 2

ok

Answer 3

divide both sides by 2 so we have x^2 + 6x = 5

Answer 4

okay.

Answer 5

now we are going to do something a little funky/interesting to get what we want.

add 9 to both sides so we get

x^2 + 6x + 9 = 14.

With this we can get (x+3)^2 = 14

understand how I got that?

Answer 6

yah.

Answer 7

now we will take the sqrt of each side to get

|x+3| = sqrt(14)

Answer 8

uh-huh

Answer 9

-3 from each side to get x = -3+- sqrt(14) so A

Answer 10

ty :)

Answer 11

np :)