Question

(a+b) ²-(a-b)²=_______ ( )
(a)-4ab (b) 0 (c) 2 (a²+b²) (d) 4 ab​

Answer 1

Answer:

(a+b) ²-(a-b)²=4ab

Option d

Step-by-step explanation:

Given that:-

(a+b) ²-(a-b)²

=>(a²+2ab+b²)-(a²-2ab+b²)

=>a²+2ab+b²-a²+2ab-b²

=>(a²-a²)+(2ab+2ab)+(b²-b²)

=>0+4ab+0

=>4ab

(a+b) ²-(a-b)²=4ab

Answer 2

Answer:

4 ab

Step-by-step explanation:

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

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

= a ^2+b.^ 2 +2ab - a ^2 - b^ 2 +2ab

= 2ab+2ab

=. 4 ab

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