Express the following as in the form of (a+b)(a-b)
(i) a 2 - 64
(ii) 20a 2 45b2
(iii) 32x2y2 -8
(iv) x2 - 2xy + y2 - 22
(v) 49x2 - 1
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1
Answer:
1) a2-64
=(a)2-(8)2
=(a+8)(a-8)
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