Question

Solve the equation.

x2 − x − 12 = 0
A)x = 4
B)x = −3
C)x = −3 or x = 4
D)x = −4 or x = 3

Answer 1

C:
`x=-3` or
`x=4`

Explanation:

To solve the equation
`x^2-x-12=0` we need to factor it

We are looking for two numbers that when multiplied give -12 and when added give -x

This means that when factored, the equation would be
`(x-4)(x+3)=0`

Now we can set each of these equal to 0, which means that at

`x=-3` and
`x=4` , the equation will equal 0