If , Find:f(x)=2x^2-7x+3 Find F(2) And F(-3)?
Answer:
The concepts of substitution and evaluation are involved. If you have F(x) and you are asked to find F(2), it means you put a 2 wherever x in a minute is. (You substitute 2 for x.)
F(2) = 2*2^2 -7*2 +3
After you do that, you need to evaluate the expression. You start with the exponent.
F(2) = 2*4 -7*2 +3
After that, you evaluate the multiplication
F(2) = 8 -14 +3
Then, you evaluate the addition and subtraction
F(2) = -3
F(3) = 2*(-3)^2 -7*(-3) +3
= 2*9 -7(-3) +3
= 18 +21 +3
F(3) = 42
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