25x2(y-1)-5x3(1-y)
=25x2(y-1)+5x3(y-1)
=5x2(y-1)(5+x)
xy+2x+5y+10
=(xy+2x)+(5y+10)
=x(y+2)+5(y+2)
=(y+2)(x+5)
1; \(25x^2\left(y-1\right)-5x^3\left(1-y\right)=25x^2\left(y-1\right)+5x^3\left(y-1\right)=5x^2\left(y-1\right)\left(5+x\right)\)
2; \(xy+2x+5y+10=x\left(y+2\right)+5\left(y+2\right)=\left(x+5\right)\left(y+2\right)\)