Question

tìm x biết (4-2x)(5x-10)

Answer 1

\(\left(4-2x\right)\left(5x-10\right)=0\\ \Leftrightarrow2\left(2-x\right)5\left(x-2\right)=0\\ \Leftrightarrow-10\left(x-2\right)^2=0\Leftrightarrow x-2=0\Leftrightarrow x=2\)

Answer 2

\(\left(4-2x\right)\left(5x-10\right)=0\)

\(\Leftrightarrow x=2\)