Question

Help asap please :)

which of the following expressions is equal to -x^2-36?
A: (-x+6i)(x-6i)
B: (x+6i)(x-6i)
C: (-x-6i)(x+6i)
D: (-x-6i)(x-6i)

Answer 1

D: (-x-6i)(x-6i)

Explanation:

(-x-6i) (x-6i)

-x^2 +6ix -6ix -36

-x^2 -36

So, D is the correct

Answer 2

`- x {}^(2) - 36 \\ - (x {}^(2) + 36) \\ - (x {}^(2) - (6i) {}^(2) ) \\ - (x - 6i)(x + 6i) \\ ( - x + 6i)(x + 6i) \: \: or \: \: (x - 6i)( - x - 6i)`

Answer: D