Question

Simplify:
$(2x+y+5)(2x+y-9)$

Answer 1

$\purple{\bf{Answer:-}}$

$(2x + y + 5)(2x + y - 9) \\ 4 {x}^{2} + 2xy - 18x + 2xy + {y}^{2} - 9y + 10x + 5y - 45 \\ 4 {x}^{2} + {y}^{2} + 2xy + 2xy - 18x + 10x - 9y + 5y - 45 \\ 4 {x}^{2} + {y}^{2} + 4xy - 8x - 4y - 45$

Your Answer:-

${\tt{4 {x}^{2} + {y}^{2} + 4xy - 8x - 4y - 45}}$

Answer 2

Answer:

4x² + 4xy + y² - 8x - 4y - 45.