Question

simplify (a+b)²-(a-b)² ​

Answer 1

Answer:

4ab

Step-by-step explanation:

(a+b)²-(a-b)²

a²+b²+2ab- ( a²+b²-2ab)

a²+b²+2ab -a²-b²+2ab

2ab+2ab

4ab

Answer 2

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(1+2)^2 - (1-2)^2