Question

-7-2x^2= -45
Solve quadratic function with square roots

Answer 1

i am noy sure but ...
-7-2x^2=-45
-7-2x^2+45=0
-2x^2+32=0
-2(x^2-16)=0
-2(x^2-16)/2=0/2
x2-16=0
(x+4)(x-4)=0
x=4,-4

Answer 2

Not sure? Try your answer in the original formula, and see if it works!

\[-7-2x^2=-45\]we think \(x=4\) might be a solution, so let's try it.
\[-7-2(4)^2=-45\]\[-7-2*16 = -45\]\[-7-32=-45\]\[-39=-45\]apparently that's not the solution.

Answer 3

okey((try you

Answer 4

so what would the answers be?

Answer 5

-2x^2=-45+7
-2x2=-38
Divided by -2
x2=19
So x=√(19) and -√(19)

Answer 6

Got it...

Answer 7

yes thank you!

Answer 8

Welcome