Question

Solve x2 + 9x + 20 = 0.

x = 2, x = 10

x = −2, x = −10

x = −5, x = −4

x = 5, x = 4

Answer 1

Any ideas?

Answer 2

nope

Answer 3

http://en.wikipedia.org/wiki/Quadratic_equation

Answer 4

$$\huge x^2 + 9x + 20$$

Answer 5

x=-5,-4

Answer 6

You take get \(a\), \(b\), and \(c\). Then, to find \(x\):
\[x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}\]

Answer 7

So \[x = \frac {-9 \pm \sqrt {9^2 - 4 * 1 * 20}} {2 * 1}\]

Answer 8

Is it A

Answer 9

I gave you a formula with no variables. Just take a calculator and calculate it.

Answer 10

Is it B

Answer 11

Calculate it.

Answer 12

I can tell you that it's C(x = -5, x = -4)

Answer 13

@harliedanielfrye ?

Answer 14

Yeah that i was gonna say

Answer 15

Write the formula down please. That way you can just look at it when you need it.

Answer 16

well my sister just toke so no need

Answer 17

What does that even mean?