Emily M.

asked • 01/08/15

Given that f (x)= 2x^2-x-3 , find the following:

3. F (-4)
4. F (x-5) 

1 Expert Answer

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Jan K. answered • 01/08/15

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f(-4) = 2(-4)^2 -(-4) -3 =
2(16) + 4 -3 =
32 +4 -3 =
33
 
f(x - 5) = 2(x - 5)^2 -(x-5) -3 =
2(x^2 -10x + 25) - x + 5 -3 =
2x^2 -20x  + 50 -x + 5 - 3 =
2x^2  -21x + 52 =
(2x - 13)(x -4)
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Emily M.

I'm so sorry lol its my first time using this amd I ddidn't mean to put a thumbs down . The thumb is so little that I went to click thumbs up but ot click thumbs down.
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01/08/15

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