2x – 3y is a factor of:
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e 4x2 + 2x – 3y + 9y2 – 12xy.
| Understanding/Application |
|
4x2 + 2x - 3y + 9y2 - 12xy = 4x2 + 9y2 + 2x - 3y - 12xy |
|
= (2x - 3y)2 + 2x - 3y = (2x - 3y) (2x - 3y + 1) Thus, 2x - 3y is a factor of 4x2 + 2x - 3y + 9y2 - 12xy. |