Please help me with these questions!
1. Factorize:
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...