Question

giúp em với ạ 

Answer 1

\(a,=36-\left(x-y\right)^2=\left(6-x+y\right)\left(6+x-y\right)\\ b,=\left(x+5\right)\left(x^2-5x+25\right)-x\left(x+5\right)=\left(x+5\right)\left(x^2-6x+25\right)\\ c,=x^2\left(2x+1\right)-4\left(2x+1\right)=\left(x-2\right)\left(x+2\right)\left(2x+1\right)\\ d,=\left(x-3y\right)\left(x+3y\right)-2\left(x-3y\right)=\left(x-3y\right)\left(x+3y-2\right)\\ e,=\left(x-2y\right)^2-\left(z-2t\right)^2=\left(x-2y-z+2t\right)\left(x-2y+z-2y\right)\\ b,=6x^2-2x-3x+1=\left(3x-1\right)\left(2x-1\right)\)