Question

if I write (a+b)^2 = a^2 +b^2 . is it correct ? , if not .... then what mistake anyone is commitng ?​

Answer 1

No you cannot write it like that because that's not how squaring works.

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

This is the right equation

Answer 2

Answer:

You can't do that because,

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

and not

$a {}^{2} + b {}^{2}$

Step-by-step explanation:

As we know,

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

Formulating,

$a \times (a + b) + b \times (a + b)$

$a {}^{2} + ab \: + ab + b {}^{2}$

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

Hope you get this!