Câu 1:
a) \(10x^2y^4:5x^2y^2=5y^2\)
b) \(\left[3x^2\left(2x^2-3x+1\right)\right]:3x^2=2x^2-3x+1\)
Câu 2:
a) \(4x-4y=4\left(x-y\right)\)
b) \(x^2+4x+4-y^2=\left(x+2\right)^2-y^2=\left(x+2-y\right)\left(x+2+y\right)\)
c) \(x^2+5x-6=x\left(x-1\right)+6\left(x-1\right)=\left(x-1\right)\left(x+6\right)\)