Question

PLEASE HELP Which of the following expressions is equal to-4x^2-36? A:(-4x-9i)(x-4i) B:(-4x+9i)(x-4i) C:(-4x-12i)(x+3i) D:(-4x+12i)(x+3i)

Answer 1

C is equal to -4
`x^(2)` - 36

Explanation:

C: ( -4x -12) ( x + 3)

= multiply -4x × x = -4
`x^(2)`

= multiply -4x × 3 = -12x

= multiply -12 × x = -12x

= multiply -12 × 3 = -36

= -4
`x^(2)` -24x -36, simplified to (-4
`x^(2)` - 36)