Question

x²- 7x- 18=0 please explainnnnn thankyou!!

Answer 1

$x {}^{2} - 7x - 18 = 0$

$x {}^{2} - 9x + 2x - 18 = 0$

$x (x - 9) + 2(x - 9) = 0$

$(x + 2)(x - 9) = 0$

$x = - 2 \: \: and \: \: \: x = 9$


$thanks$