Question

Solve the quadratic equation below.
x2 + 6x – 15 = -8

Answer 1

x²+6x-15=-8

Explanation:

x = (1)

x²= 1

6x = 6

6 + 1 = 7

7 - 15 = -8

(Hope this helps)

Answer 2

x²+6x-15=-8

x²+6x-7=0

Δ= b²-4ac = 36+28=64

x₁,₂=
`(-6(+/-)√(64) )/(2)`

x1=
`(-6+√(64) )/(2)`=
`(-6+8 )/(2)`=

`(2)/(2)`=1

x2=
`\frac{-6-sqrt{64} }{2}`=
`(-6-8 )/(2)`=

`(-14)/(2)`=7