SOLUTION: Hi I am working on Polynomials for homework and I am not sure how to solve this problem here is the problem. -10.3x^2-x+6.5 for a.x=-1 b.x=-2

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Hi I am working on Polynomials for homework and I am not sure how to solve this problem here is the problem. -10.3x^2-x+6.5 for a.x=-1 b.x=-2      Log On


   

Question 1059778: Hi I am working on Polynomials for homework and I am not sure how to solve this problem here is the problem.
-10.3x^2-x+6.5 for
a.x=-1
b.x=-2
Found 2 solutions by Boreal, stanbon:
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
-10.3x^2-x+6.5 for
a.x=-1
b.x=-2
-10.3(1)-(-1)+6.5=-10.3+1+6.5=-2.8. You substitute (-1)^2 for x which is 1, then multiply it by -10.3, which is the same, -10.3. Then subtract a -1, which is adding 1, then add 6.5.
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-10.3(4)-(-2)+6.5=-41.2+2+6.5=-32.7
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graph%28300%2C300%2C-10%2C10%2C-40%2C10%2C-10.3x%5E2-x%2B6.5%29

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
f(x) = -10.3x^2-x+6.5 for
a.x=-1
f(-1) = -10.3(-1)^2 -(-1)+6.5 = -10.3 + 7.5 = -2.8
--------------------
b.x=-2
f(2) = -10.3(-2)^2 -(-2) + 6.5 = -41.2 + 8.5 = -32.7
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Cheers,
Stan H.
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