Question

Answer 1

\(a,=x^2+x-6\\ b,=x\left(5x-2y\right)\\ c,=2x^2-4xy\\ d,=\left(x-3\right)\left(5x+1\right)\\ e,=\left(x-5-3y\right)\left(x-5+3y\right)\\ f,=\left(x-2\right)^2\\ g,=10x-15x^2\\ h,Sửa:\left(2x+5\right)^2-4x^2=\left(2x+5+2x\right)\left(2x+5-2x\right)=5\left(4x+5\right)\)

Answer 2

 \(a,=x^2-2x+3x-6=x^2+x-6\\ b,=x\left(5x-2y\right)\\ c,=2x^2-4xy\\ d,=5x^2-15x-3+x=5x^2-14x-3\\ e,=\left(x-5-3y\right)\left(x-5+3y\right)\\ f,=\left(x-2\right)^2\\ g,=-15x^2+10x\\ h,=\left(2x+5-2x\right)\left(2x+5+2x\right)=5\left(4x+5\right)\)