Question 73877: Given that T(x) = – 2x^2 – 5x – 8, evaluate : T(2).
2x=2x^2-5x-8
7x=2x^2-8
After this part i'm lost can anyone help
Answer by bucky(2189)   (Show Source):
You can put this solution on YOUR website! Given:
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T(x) = – 2x^2 – 5x – 8
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evaluate T(2)
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Evaluate T(2) just means to go back to the equation, substitute 2 for every x you see, and
then do the calculations. Let's do it ...
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First the equation:
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T(x) = – 2x^2 – 5x – 8
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Next, plug 2 in for every x to get:
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T(2) = – 2*(2^2) – 5*(2) – 8
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Then do the calculations. (2^2) = 4 so the first term changes to -2*(4)and the equation
becomes:
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T(2) = -2*4 - 5*2 - 8
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Do the multiplications on the right side:
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T(2) = - 8 - 10 - 8
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Combine all the terms on the right side:
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T(2) = -26
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and that's the answer. Hope this helps you understand the "evaluation" process.
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