SOLUTION: Evaluate the expression, given x = -2, y = 3, and a = -4. 38). -x2 - 6a

Algebra ->  Linear-equations -> SOLUTION: Evaluate the expression, given x = -2, y = 3, and a = -4. 38). -x2 - 6a      Log On


   

Question 101770: Evaluate the expression, given x = -2, y = 3, and a = -4.
38). -x2 - 6a
Answer by bucky(2189) About Me  (Show Source):
You can put this solution on YOUR website!
Given the polynomial:
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x%5E2+-+6a
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You are to evaluate this function when x = -2 and a = -4. The fact that y = 3 has no meaning
in this problem because the given polynomial doesn't contain any terms involving y.
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All you need to do is replace x in the given polynomial by -2 and replace a by -4. Then do
the computations and simplify.
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Replacing x by -2 changes the polynomial to:
.
%28-2%29%5E2+-+6a
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Then replacing a by -4 further changes the polynomial to:
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%28-2%29%5E2+-+6%28-4%29
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Squaring the -2 means multiplying -2 times -2 and that results in +4. And multiplying the
-6 times -4 results in + 24. These results reduce the polynomial to:
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4+%2B+24
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Adding these two terms gives you the answer 28.
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The answer to this problem is 28
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Hope this helps you to understand the problem and how to go about solving it.
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