Evaluate using identity (99-7)cube
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Step-by-step explanation:
(99-7)³ = (92)³
= (90+2)³
= (90)³+(2)³+3(90)²(2)+3(90)(2)²
= 729000+8+6(8100)+12(90)
= 729000+8+48600+1080
= 778688
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