Q8 of 34 Page 14

Factorize each of the following algebraic expressions:

49 – (a2 – 8ab + 16b2)

= 49 – (a – 4b)2

We know:
a2 – b2 = (a + b)(a-b)

= (7 + a – 4b) (7 – a + 4b)


= - (a – 4b + 7) (a – 4b – 7)

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