Question

Алгебра 8 класс решите

Answer 1

X^2+x-12=0
A=1 B=1 c=-12
D=b^2-4ac=1-4*1*-12=49=7^2
X1=-B-D/2a=-1-7/2=-8/2=-4
X2=-B+D/2a=-1+7/2=6/2=3