Question #N174
The function *f* is defined by *f*(x) = 2x^2 - 5. What is the value of *f*(-3)?
A. -23
B. -19
C. 19
D. 23
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Correct Answer is: D
To find *f*(-3), substitute -3 for x in the function: *f*(-3) = 2(-3)^2 - 5. Simplify: *f*(-3) = 2(9) - 5, or *f*(-3) = 18 - 5, or *f*(-3) = 13.