Question

Given
f(x)= 2x2 + 5x - 17, find f(-1).

Answer 1

Step by Step Solution:

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Reformatting the input :

Changes made to your input should not affect the solution:

(1): "x2" was replaced by "x^2".

Rearrange:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

f*(x)-(2*x^2+5*x-17)=0

STEP

1

:

Equation at the end of step 1

fx - ((2x2 + 5x) - 17) = 0

STEP

2

:

Equation at the end of step 2

fx - 2x2 - 5x + 17 = 0

STEP

3

:

Solving a Single Variable Equation

3.1 Solve fx-2x2-5x+17 = 0

In this type of equations, having more than one variable (unknown), you have to specify for which variable you want the equation solved.

Explanation:

Answer 2

You plug in -1 wherever you see x
So here is the work:
F(-1)= 2*2 +5(-1) -17
= 4 + -5 -17
= -18

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