Question

after simplifying (a + b) (a + b) - (a - b) (a - b ) ? we get
a) 2ab
b) ab
c) 6ab
d) 4ab​

Answer 1

Answer:

(a + b) (a + b) - (a - b) (a - b )

[(a + b)²] - [(a - b)²]

(a² + b² + 2ab) - (a² + b² - 2ab)

a² + b² + 2ab - a² - b² + 2ab

a² - a² + b² - b² + 2ab + 2ab

2ab + 2ab

4ab

Hence the answer is (d).