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Question
If z = 10, find the value of z3 − 3 (z − 10).
Sum
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Solution
z3 − 3 (z − 10)
= z3 − 3z + 30
= (10 × 10 × 10) − (3 × 10) + 30
= 1000 − 30 + 30
= 1000
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