Question

tìm x: (x-2).(x+4)=0

Answer 1

(x-2).(x+4)=0

<=>x-2=0 và  x+4=0

<=>x=2 và x=-4

k nha

Answer 2

\(\left(x-2\right)\left(x+4\right)=0\)

\(\Leftrightarrow\int^{x-2=0}_{x+4=0}\)

\(\Leftrightarrow\int^{x=0+2=2}_{x+4=0-4=-4}\)