Question

помогите!!
Разложите на многочлен:
1) 81-64x^2y^2
2)49x^2-14xy+y^2

Answer 1

81-64х²у²=(9-8ху)(9+8ху)
49х²-14ху+у²=(7х-у)(7х-у)=(7х-у)²

Answer 2

1) 9^2 - (8xy)^2=(9-8xy)(9+8xy)
2) (7x)^2 -14xy + y^2= (7x-y)(7x-y)