Question

3x+2x^2-2

gấp ạ

Answer 1

đề bài là j vậy

Answer 2

(x-1/2).(x+2)

Answer 3

\(3x+2x^2-2=0\\ \Rightarrow\left(2x^2+4x\right)-\left(x+2\right)=0\\ \Rightarrow2x\left(x+2\right)-\left(x+2\right)=0\\ \Rightarrow\left(2x-1\right)\left(x+2\right)=0\\ \Rightarrow\left[{}\begin{matrix}x=\dfrac{1}{2}\\x=-2\end{matrix}\right.\)

Answer 4

⇔2x²+4x-x-2=0

⇔2x(x+2)-(x+2)=0

⇔(x+2)(2x-1)=0

⇔x+2=0 hoặc 2x-1=0

⇔x=-2 hoặc x=1/2