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**Please help me with these questions!**

**1. Factorize:**

a) 7(x+y)² + 48(x+y) - 7

b) 5 - 20x²

c) 2xy² - 22xy + 48x

a) 7(x+y)² + 48(x+y) - 7

b) 5 - 20x²

c) 2xy² - 22xy + 48x

**I tried a lot to solve these equations, can't work it out! Here are some of the solutions i got! for (a):**

=7(x²+2xy+y²) + 48 (x+y) - 7

=7x²+14xy+7y²+48x+48y - 7

(cant work it out any further)

=7(x²+2xy+y²) + 48 (x+y) - 7

=7x²+14xy+7y²+48x+48y - 7

(cant work it out any further)

for (b):

(√5)² - (2√5)²

(√5+2√5) (√5+2√5) (is it correct??!)

i can't even think of away to work out the third one!

( i know this is maths but pls help me out!)