Question

(b) (2x – y + 4)(2x - y - 3)​

Answer 1

Answer:

4x² + y² - 4xy + 2x - y - 12

Step-by-step explanation:

(2x - y + 4) (2x - y - 3)

= 2x (2x - y - 3) - y (2x - y - 3) + 4 (2x - y - 3)

= 4x² - 2xy - 6x - 2xy + y² + 3y + 8x - 4y - 12

= 4x² + y² - 2xy - 2xy - 6x + 8x + 3y - 4y - 12

= 4x² + y² - 4xy + 2x - y - 12