Find the value of the following expressions when (i) n = – 1 and (ii) n = 2
n3+5n2+5n-2
Answers
Answered by
2
Answer: (i) -20 , (ii) 34
Step-by-step explanation:
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Answered by
1
Answer:
1) -20 2) 34
Step-by-step explanation:
Ans1. Put n= -1
= -1X3 + 5X(-1)(2) + 5(-1) - 2
= (-3) + (-5)(2) + (-5) - 2
= -3 - 10 - 5 - 2
= -20
Ans2. Put n= 2
= 2X3 + 5X2X2 + 5X2 - 2
= 6 + 20 + 10 - 2
= 36 - 2
= 34
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