SOLUTION: Find the value of k if f(x) =x^2+kx-35 has x= 5 as a 'root.

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Question 628056: Find the value of k if f(x) =x^2+kx-35 has x= 5 as a 'root.
Found 2 solutions by reviewermath, stanbon:
Answer by reviewermath(1029) About Me  (Show Source):
You can put this solution on YOUR website!
Substitute x = 5 and solve for k.
5%5E2+%2B+5k+-+35+=+0
5k+=+10
highlight%28k+=+2%29

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Find the value of k if f(x) =x^2+kx-35 has x= 5 as a 'root.
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f(5) = 5^2 + 5k -35 = 0
5k -10 = 0
k = 2
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Cheers,
Stan H.
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