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Question
Factorise: (4.5)2 – (1.5)2
Sum
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Solution
(4.5)2 – (1.5)2
= (4.5 + 1.5) (4.5 - 1.5) ...[a2 – b2 = (a + b) (a – b)]
= 6 × 3 = 18
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Factorisation by Difference of Two Squares
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