Question

Разложите на множители: a)81-a^2 b)5x^2-5y^2 c)3x^2-6xy+3y^2

Answer 1

a)81-a²=(9-a)(9+a)
b)5x²-5y²=5(x²-y²)=5(x-y)(x+y)
c)3x²-6xy+3y²=3(x²-2xy+y²)=3(x-y)²

Answer 2

спс