Question

Answer 1

ai làm hộ mk mấy câu tự luận voiwsiii. Mk gấp lắm. 

Answer 2

Câu 5:

a) \(24x^2-4xy=4x\left(6x-y\right)\)

b) \(5x^3-10x^2+5x-20xy^2=5x\left(x^2-2x+1-4y^2\right)=5x\left[\left(x-1\right)^2-\left(2y\right)^2\right]=5x\left(x-1-2y\right)\left(x-1+2y\right)\)

Câu 6:

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

b) \(2x^2+5x-2x\left(x+5\right)=0\\ \Rightarrow2x^2+5x-2x^2+-10x=0\\ \Rightarrow-5x=0\\ \Rightarrow x=0\)