Question

Evaluate the function for the indicated value, then simplify. f (x) = -4x2 + 3x; find f (-2) Group of answer choices -13 58 -22 2 

          Evaluate the function for the indicated value, then simplify.
f (x) = -4x2 + 3x; find f (-2)
Group of answer choices
-13
58
-22
2

Added by Emily P.

Elementary and Intermediate Algebra
Elementary and Intermediate Algebra
Alan S. Tussy, R. David Gustafson 5th Edition
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Evaluate the function for the indicated value, then simplify. f (x) = -4x2 + 3x; find f (-2) Group of answer choices -13 58 -22 2
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Transcript

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00:01 In this problem we have to use the function to evaluate the indicated expressions and we have to simplify these expressions function is given here f x equal 3x square plus 4 and we have to find first f x plus 2 first we have to find f x plus 2 since f x is 3 x square plus 4 this will become 3x 2 whole square plus 4 simplifying this we will have 3 into and x plus 2 whole square is x square plus 2 2 2 2 2 2 and plus 4 so further simplifying this is 3 into x square plus 4 plus 4 x and finally if you multiply this 3 inside this bracket so 3 x square plus 12 plus 2 12x plus 4 so this is equal to 3x square plus 12 x plus 16 so this is f x plus 2 is equal 3x square plus 12 x plus 16 now the next we have to find fx plus f2 fx plus fx plus f2 so fx is given here 3x square plus 4 and f2 will be 3 into 2 2 2 square plus 4.
01:41 So this is equal to 3x square plus 4 and plus 4 into 3 that is 12 plus 4 16...
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