Question

x^4-2x^3-3x^2=()() x^2y^2-10xy+9 (x+y)^2-10(x+y)+9

Answer 1

x^4-2x^3-3x^2=()()

=x²(x²-2x-3)

=x²(x-3)(x+1)

x^2y^2-10xy+9

=(xy-9)(xy-1)

(x+y)^2-10(x+y)+9

=(x+y-9)(x+y-1)