Question

MEDAL IF HELPED
MEDAL IF HELPED
MEDAL IF HELPED

Solve -2x2 - 16x - 44 = 0.

A. x equals negative 8 plus or minus I square root of 6

B. x equals negative 8 plus or minus 2i square root of 6

C. x equals negative 4 plus or minus i square root of 6

D. x equals negative 4 plus or minus 2i square root of 6

Answer 1

First, divide both sides by -2.
What do you get?

Answer 2

x^2+8x+22=0

Answer 3

Great.
This is not factorable because there are no two numbers that multiply to 22 and add to 8.

Answer 4

That means we use the quadratic formula.

Answer 5

uhhggg i hate that word

Answer 6

\(x = \dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a} \)

Answer 7

It's not that bad.
In your case, a = 1, b = 8, and c = 22.

Answer 8

Now we plug in.

Answer 9

\(x = \dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a}\)

\(x = \dfrac{-8 \pm \sqrt{8^2 - 4(1)(22)}}{2(1)}\)