Question

Use the quadratic formula to solve the equation. If necessary, round to the nearest hundredth.
x^3+3=-4x

A. 1, 3
B. -1, -3
C. 1, -3
D. -1, 3

Answer 1

What's the quadratic formula?

Answer 2

x= -b±√ b^2-4ac / 2a

Answer 3

Does the problem say x^3 or x^2?

Answer 4

X^2 sorry it was a typo

Answer 5

All good!
Yep, that's the equation! And a, b, and c are defined as:
\[ax^2+bx+c=0\]
However, the equation above isn't in that form! Thus, you need to make it so that it is. You do so by adding 4x to both sides. You end up with: \[x^2+4x+3=0\]
So what is a, b and c? Then, you simply plug those values in to the quadratic equation!

Answer 6

I got b? @ijakez

Answer 7

yup!

Answer 8

Thank you so much!!