Question

Please help i’m so confused

Answer 1

x = -2, -8.

Explanation:

x =[(-b +/- √(b^2 - 4ac)] / 2a

x^2 + 10x + 16 = 0

Here a = 1, b = 10 and c = 16, so substituting in the formula:

x = [-10 +/- √(10^2 - 4*1*16)] / 2

= (-10 +/- √36)/2

= (-10 +/- 6)/2

= -4/2, -16/2

= -2, -8.

Answer 2

x = - 8 , x = - 2

Explanation:

x² + 10x + 16 = 0

with a = 1, b = 10 , c = 16

then using the given quadratic formula

x =
`(-10+/-√(10^2-(4(1)(16)) )/(2)`

=
`(-10+/-√(100-64) )/(2)`

=
`(-10+/-√(36) )/(2)`

=
`(-10+/- 6)/(2)`

then

x =
`(-10-6)/(2)` =
`(-16)/(2)` = - 8

x =
`(-10+6)/(2)` =
`(-4)/(2)` = - 2