Question

разложите на множители :
16х(4)-81
х(2)-х-у(2)-у

Answer 1

1) 16x^4-81=(4x^2-9)(4x^2+9)=(2x-3)(2x+3)(4x^2+9)

2) x^2-x-y^2-y=(x^2-y^2)-(x+y)=(x+y)(x-y)-(x+y)=(x+y)(x-y-1)