Question

$x { }^{2} - 2x - 15$
​

Answer 1

$\huge\underline\mathfrak\purple{Answer}$

x² - 2x - 15

x² - 5x + 3x - 15

x ( x - 5 ) + 3 ( x - 5 )

( x + 3 ) ( x - 5 )

Thanks!

Answer 2

$x(x - 5) + 3(x - 5) = 0$

${x}^{2} - 2x - 15 = 0$

${x}^{2} - 5x + 3x - 15 = 0$

$x(x - 5) + 3(x - 5) = 0$

$(x - 5)(x + 3) = 0$

$x - 5 = 0 \: \: \: \: \: or \: \: \: \: \: x + 3 = 0$

$x = 5 \: \: \: \: \: or \: \: \: \: \: x = - 3$

HOPE IT HELPS..