Evaluate the expression when =n−5 . n^2+9n+7
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Your question seems to have an issue. Is it to evaluate n^2 + 9n +7 when n = -5 or it was a continuation of a another question. Kindly clarify.
Evaluate n^2 + 9n +7 when n = -5
n^2 = -5 x -5 = 25, remember - x - = +
9n = 9 x -5 = - 45, also keep in mind - x + = -
So combine: 25 + (-45) + 7
= 25 + 7 + (-45)
= 25 + 7 - 45
= 32 - 45
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