Question

what is the formula for (a+b)^2??
​

Answer 1

Answer:

(a + b)² = a² + 2ab + b²

Explanation:

mark me as brainliest

Answer 2

Answer:

$\huge{\boxed{\boxed{\colorbox{pink}{ ◦•●◉✿solution✿◉●•◦}}}}$

◦•●◉✿this is identity (1)✿◉●•◦

(a+b)²= a²+2ab+b²

how to use this identity:-

question:- simplify using suitable identity

1. (5a+7b)²

let's find out!!

using identity (l) ==> (a+b)² = a²+2ab+b²

==> (5a+7b)² = 5a²+ 2(5a)(7b)+ b²

==> (5a+7b)² = 25a²+ 70ab + 49b²

hence the Answer is 25a²+70ab+49b²

$\underline\mathfrak\red{◦•●◉✿learn✿◉●•◦\:◦•●◉✿more✿◉●•◦}$

==>> there are 4 identity

identity 1:- (a+b)²=a²+2ab+b²

identity 2:- (a-b)² = a²- 2ab + b²

identity 3:- (a+b) (a-b) = a²-b²

identity 4:- (x+a) (x+b) = x²+(a+b)x + ab