x^3-25x;
=x(x²-25)
=x(x-5)(x+5)
-4x^3+4x^3-x^3;
= -x³
x^2(x-y)-y^2(x-y)
=(x-y)(x²-y²)
=(x-y)²(x+y)
(x-1)(x-3)+1
=x²-4x+4
=(x-2)²
x^3-25x;
=x(x²-25)
=x(x-5)(x+5)
-4x^3+4x^3-x^3;
= -x³
x^2(x-y)-y^2(x-y)
=(x-y)(x²-y²)
=(x-y)²(x+y)
(x-1)(x-3)+1
=x²-4x+4
=(x-2)²