Question

Разложите на множители:3)ab-ac+2b-2c
4)100x²-9
5)3x²+6xy+3y²

Answer 1

3) a(b-c)+2(b-c)=(b-c)(a+2)
4)(10x-3)(10x+3)
5) 3(x²+2xy+y²)=3(x+y)²=3(x+y)(x+y)