Factorise the following.​

x⁴ - y⁴= (x²)²- (y²)² = (x² + y²)(x²- y²) = (x²+y²)(x)²-(y)²=(x²+y²)(x+y)(x-y)

49x²-16/25= (7x)²- (4/5)²=(7x+4/5)(7x-4/5)

(7x + 4/5)(7x - 4/5)

Step-by-step explanation:

iv. 49x² - 16/25

= (7x)² - (4/5)²

= (7x + 4/5)(7x - 4/5)

for a it would be 24 children.

for b i don't understand the question. is it saying for each individual person they pick 5 reds to 7 greens or is it the whole group. clarify and i hope this can you.

step-by-step explanation: