What is the value of (3x3 + 5x2y + 12xy2 + 7y3) when x = -4 and y = -1?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e -327.
(3x3 + 5x2y + 12xy2 + 7y3) when x = -4 and y = -1
⇒ 3(-4)3 + 5(-4)2(-1) + 12(-4)(-1)2 + 7(-1)3
⇒ - 3(64) - 5(16) - 48 - 7
⇒ - 192 - 80 - 48 - 7 = -327