Question

a plus b all square formula

Answer 1

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

Answer 2

Answer:

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

Step-by-step explanation:

We are supposed to find the formula of $(a+b)^2$

So, $(a+b)^2$   can be written as  $(a+b)(a+b)$

So, $(a+b)^2=(a+b)(a+b)$

$(a+b)^2=a(a+b)+b(a+b)$

$(a+b)^2=a^2+ab+ba+b^2$

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

So, the formula of $(a+b)^2$ is $a^2+2ab+b^2$

Hence  $(a+b)^2=a^2+2ab+b^2$