Question

How can you find f(3) if f(x) = -2x^2 - 4? A) Square 3. Subtract 4 from the result, and then multiply by -2 B) Square 3. Multiply the result by -2, and then subtract 4 C) Multiply 3 by f D) Multiply -2 by 3, square the result, and then subtract 4

Answer 1

B

Explanation:

By order of operations, we have to do the squaring of the 3 first. After that, we have to tackle multiplication or division, whichever we come to first in the equation. That means that we multiply the square of 3 by -2. After we do that, all of the multiplication/division is done and we can do the addition/subtraction next which, in our case, is to subtract away 4.