Question

Представьте в виде произведения а) (y-6)^2-9y^2 b) c^2-d^2-c+d

Answer 1

1) (y-6-3y)(y-6+3y) = -(2y+6)(4y-6)
2) (c-d)(c+d)-(c-d) = (c-d)(c+d-1)