evaluate (9.9) whole cube by using suitable identity
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(9.9)³
→ (100-90.1)³
(a-b)³ = a³-b³-3ab(a-b)
→ (100)³-(90.1)³-3(100)(90.1){100-90.1}
→ 1000000-731432.701 - 27030(9.9)
→ 1000000-731432.701-267597
→ 970.299
Hope it helps
→ (100-90.1)³
(a-b)³ = a³-b³-3ab(a-b)
→ (100)³-(90.1)³-3(100)(90.1){100-90.1}
→ 1000000-731432.701 - 27030(9.9)
→ 1000000-731432.701-267597
→ 970.299
Hope it helps
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