Question

(2x + 3y)^2– 5(2x + 3y) – 14

Answer 1

$\sf {(2x + 3y)}^{2} - 5(2x + 3y) - 14 \\ \\ \boxed{ \sf{(a + b)}^{2} = {a}^{2} + 2ab + {b}^{2} } \\ \\ \sf {(2x)}^{2} + 2(2x)(3y) + {(3y)}^{2} - 10x - 15y - 14 \\ \\ \sf4 {x}^{2} + 12xy + 9 {y}^{2} - 10x - 15y - 14 \\ \\ \boxed{\sf4 {x}^{2} + 9 {y}^{2} - 10x - 15y + 12xy - 14}$

$\\ \\ \\ \color{purple}{ \bf{Hope \: \: this \: \: helps \: \: you \: !}}$