Question

factorise by splitting middle term
$x {}^{2} - 7x + 12$

Answer 1

x^2-7x+12
x^2-(4+3)x+12=0
x^2-4x-3x+12=0
x(x-4)-3(x-4)=0
(x-4)(x-3)=0
x-4=0 or x-3=0
x=4 or x=3
I hope it will help you!!!