Hi. Please i need help with these questions :

Simplify
1.
2.
3.

1)

2)

3)

1.

By using identinty a² - b² = (a + b)(a - b) in numerator and splitting method in denominator :

Hence, answer is

________________________________

2.

By using identinty a² + 2ab + b² = (a + b)² in numerator and a² - n² = (a + b)(a - b) in denominator :

Hence, answer is

________________________________

3.

By using splitting method in both numerator and denominator :

Hence, answer is

360 different combinations

42.4

step-by-step explanation:

convert to decimal