Question

what is a plus b whole square
and also a square plus b square​

Answer 1

(a + b) ²

is both a and b square (whole squared)

a + b²

is only b square and not a, because it's not whole square and only b square

Answer 2

Answer:

[refer the attachment]

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

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