Multiply (3x + 5y + 4z) by (2x – 3y + z)
-
A.
6x2 + xy – 15y2 + 4z2 + 11xz – 7yz -
B.
6x2 + 3xy – 15y2 + 4z2 -
C.
6x2 + 3xy – y2 + 4z2 -
D.
6x2 + 3xy – 15y + z2
Correct Answer: Option A
Explanation
(3x + 5y + 4z)(2x – 3y + z)
6x2 + 9xy + 3x2 + 10xy – 15y2 + 5yz + 8xz – 12yz + 4z2
= 6x2 + xy – 15y2 + 4z2 + 11xz – 7yz