Question

write deliberation (a+b)^2

Answer 1

(a+b)(a+b)

(a*a)+ab+ab+(b*b) factorise

a^2+2ab+b^2

hence (a+b)^2=a^2+2ab+b^2

Answer 2

(a + b)²

= (a + b ) (a +b )

a² + ab +ab + b2

a² +2ab + b²