Question

using standard formula expand
(2x+y+5) (2x+y-9) ​

Answer 1

Answer:

see this answer

Step-by-step explanation:

(2x + y + 5) (2x + y - 9)

= 4x² + 2xy - 18x + 2xy + y² - 9y + 10x + 5y - 45

= 4x² + 4xy + y² - 8x - 4y

= (2x + y)² - 4(2x + y)

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

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