Question

1.simplify
1.a2-b2=(a+b) (a-b)
a3-b3=(a2+ab+b2)​

Answer 1

Step-by-step explanation:

1) (a+b)(a-b)

a*a-b*a+b*a-b*b

a^2-b^2

2) a^3-b^3=a^2+ab+b^2

(a-b)^3+3ab(a-b)=a^2+ab+b^2+3ab(a-b)