Question

What are the solutions of the quadratic equation 0 = -XP –

6x - 8?
O
2 and 4
-2 and 4
-2 and -4
2 and 4

Answer 1

-2 and -4

Explanation:

The equation
`0=-x^(2)-6x-8`

Can be written as
`x^(2) +6x+8=0`

Lets apply quadratic equation solver:

that is.
`x=\frac{-b+/-\sqrt{b^(2)-4ac } }{2a}`

where a=1, b=6, c=8

We have
`(-6+/-√(36-32) )/(2)`

The solution is then

x= -2 and x= -4