evaluate using identity 1)58^3 (2)107^3
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Answer:
1) 58³= (60-2)³
⇒60³-2³-3(60)(2)[60-2] ∵ (a-b)³= a³-b³-3ab(a-b)
⇒2160-8-360(58)
⇒2160-8-20880
⇒2152-20880
⇒-18728
2) 107³= (110-3)³ same process
⇒110³-3³-3(110)(3)[110-3]
⇒1331000-27-990(107)
⇒1331000-27-105930
⇒1225043
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