Question

Tìm x biết:

3(x-1)^2+(x+5)(2-3x)=-25

Answer 1

\(3\left(x-1\right)^2+\left(x+5\right)\left(2-3x\right)=-25\)

\(\Leftrightarrow3x^2-6x+3-3x^2-13x+10=-25\)

\(\Leftrightarrow-19x=-38\Leftrightarrow x=2\)

Answer 2

\(\Rightarrow3x^2-6x+3+2x-3x^2+10-15x=-25\\ \Rightarrow-19x=-38\\ \Rightarrow x=2\)