Question

Which of the following expressions is equal to -3x2 – 27?

Answer 1

-3×2= -6

-6-27= -33

so if we peak option B.

(-3x +91)(x+31)

solving it

-3x (x+31)+91(x+31)

-3x^2 -93x +91x +2821

we will take (-93x+91x)= -2x

so it's going to be

-3x^2 -2x +2821

this is a quadratic equation hence

2+/-√-2^2-(4×-3×2821)divided by 2×-3

2+/-√4+33852divide by -6

2+/-√33856 divide by -6

2+/- 184 divided by -6

2+/- 30.67

when you add you'll get

32.67

round it off and you get 33

which is the same as what we got at the top

so expression B is the same as

-3×2-27 which is 33

Answer 2

Answer: (-3x+9)(x+3i)

Step-by-step explanation:

It’s right