Question

(1) (a + b)² - (a - b)^2 explain with formula​

Answer 1

Step-by-step explanation:

a² + 2ab + b² - (a² - 2ab + b²)

a² + 2ab + b² - a² + 2ab - b²

4ab

Answer 2

Answer:

4ab

Step-by-step explanation:

You must know:

(a+b)² = a²+b²+2ab

(a-b)² = a²+b²-2ab

(a+b)²-(a-b)² = a²+b²+2ab-(a²+b²-2ab)

(a+b)²-(a-b)² = a²+b²+2ab-a²-b²+2ab

(a+b)²-(a-b)² = 2ab + 2ab = 4ab