Question

Formula of:
a2 - b2 = (a +b) (a - b)

Using the above formula factorise the following:

a) x2 - 4 b) a2 - 4b2 c) 9x2 - y2

c) 5x2 - 20y2 d) 13a2 - 117b2 e) 25 - 1
9y2

f) 121 x2 - 1
y2 g) 2p2 - 50
q2
I need help please solve these questions..

Answer 1

Step-by-step explanation:

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