Question

(2х-4)(х+1)=0 решите пж

Answer 1

2x²+2x-4x-4=0 I :2
x²-x-2=0
D=1²×(-4)×(-2)=1+8=9=3²
x1=1+3/2=2
x2=1-3/2=-1

Answer 2

спс