Question

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

Answer 1

The square of ( a + b ) is equal to a^2 + b^2 + 2ab. There is no explanation for this because it's a formula which you have to learn but still what I can explain is that you need to put the values of a and b in order to solve it.

Answer 2

$\bf (a+b)^{2} = a^{2}+ b^{2} +2ab$

$Here \:is\: the\: proof$

$\bf (a+b)^{2}\\ \\(a+b)(a+b)\\ \\a(a+b)+b(a+b)\\ \\a^{2}+ab + ab + b^{2}\\ \\a^{2}+b^{2}+2ab$

Hence proved