Question

Представте в виде произведения 
1)9x^2-4y^2-3x+2y
2)81-(3-8y)^2

Answer 1

(3x-2y)(3x+2y)-(3x-2y)=(3x-2y)(3x+2y-1)
(9-3+8y)(9+3-8y)=(6+8y)(12-8y)=8(3+4y)(3-2y)