Factorise the following: (i) 16 2 + 4 2 + 9 2 − 16 − 12 + 24 (ii) 27 3 − 3 − 27 2 + 9 2
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Answer:
(i) 162 + 42 + 92 − 16 − 12 + 24
= 186 + 76 + 12
= 274
(ii) 27 3 − 3 − 27 2 + 9 2
= 270-180
= 90
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