Question

solve (a+b)²=a²+b²+2ab

Answer 1

$(a + b) {}^{2} = a { }^{2} + b {}^{2} + 2ab$
Example :- a = 5 and b=6

$(5 + 6) { }^{2} = 5 {}^{2} + 6 {}^{2} + 2 \times 5 \times 6$
$25 + 36 + 2 \times 30 \\ \\ 25 + 36 + 60 \\ \\ 121$

Answer 2

hence ( a+b) ^2= a^2+ b^2+2ab
eg. if a=1 , b=2
(1+2)^2= (1)^2+(2)^2+2*1*2
=1+4+4
=9.