Question

$x(2x + 5) = 25$

Answer 1

$2 {x}^{2} + 5x - 25 = \\ 2 {x}^{2} + 10x - 5x - 25 \\ 2x(x + 5) - 5(x + 5) \\ (2x - 5)(x + 5) \\ x = \frac{5}{2} \\ x = - 5$
here is ur answer hope.it helps

Answer 2

x(2x+5) = 25
$2 {x}^{2} + 5x - 25 = 0$

${2x}^{2} + 10x - 5x - 25 = 0$
$2x(x + 5) - 5(x + 5) = 0$
$(x + 5)(2x - 5) = 0$
x= -5 and x = 5/2