Question

Solve using the quadratic formula:
x = -(-14)+- sqrt(-(-14)^2=4(-2)(12)/2(-2)

Answer 1

so far I have 14 +- sqrt(196+96)/-4 = 14+- sqrt(292)/-4

Answer 2

-2x^2-14x+12? is that the original problem?

Answer 3

yes

Answer 4

\[\frac{ -14\left(\begin{matrix}+ \\ -\end{matrix}\right)\sqrt{(-14)^2-4(-2)(12)} }{ 2(-2) }\]

Answer 5

my bad -14 in the beginning should be +14

Answer 6

I got that far but going from there is my problem

Answer 7

don't think 292 is right

Answer 8

it is

Answer 9

so then you have 14 +- sqrt(292) / -4 and how do you simplify that? to a decimal?

Answer 10

check if the original problem is correct, you might have written it down wrong

Answer 11

the original problem is -2x^2 - 14x + 12

Answer 12

@eHoaX

Answer 13

ok so everything is correct

Answer 14

I am finding the x-intercepts so I can graph the parabola

Answer 15

but when I put it into wolfram alpha I get a decimal of 9.7...

Answer 16

it should be .7 and -7.7

Answer 17

not sure what I am doing wrong

Answer 18

i am also getting -7.77 and .77