SOLUTION: If x+15=19, evaluate x^3-x^-2+9x^-1 Thank you!

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Question 466328: If x+15=19, evaluate x^3-x^-2+9x^-1
Thank you!
Found 2 solutions by stanbon, solver91311:
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
If x+15=19, evaluate x^3-x^-2+9x^-1
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Since x+15 = 19, x = 4
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Then x^3-x^-2+9x^-1
= (4)^3-(4)^(-2) + 9(4)^-1
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= 64 - (1/16) + 9(1/4)
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= 64 - (1/16) + 9(4/16)
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= 64 + 8(4/16)
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= 64+ 2
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= 66
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Cheers,
Stan H.
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Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


If , then , so calculate:





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