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8
》》Question!
Factorise → 8 - 27a³ - 36a + 54a²
》》Answer《《
8 -27a³ -36a +54a²
=(2)³ -(3a)³ - 3×2×3a(2-3a)
=(2)³-(3a)³-18a(2-3a)
=(2-3a)³
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Answered by
10
8 -27a³ -36a +54a²
=(2)³ -(3a)³ - 3×2×3a(2-3a)
=(2)³-(3a)³-18a(2-3a)
=(2-3a)³
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