Question

7 identities with example

Answer 1

(a+b)²= a²+b²+2ab. a²-b²=(a+b) (a-b). (a+b+c)²=a²+b²+ c²+2ab+2bc+2ca. (a-b)²=a²+b²-2ab. (x+a) (x+b) = x²+(a+b)x+ab.

Answer 2

Hope it will be helpful for u.