McGraw Hill Glencoe Algebra 2, 2012
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McGraw Hill Glencoe Algebra 2, 2012 View details
1. Graphing Quadratic Functions
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Exercise 80 Page 227

Calculate the function's value when x=- 2.

26

Practice makes perfect
Using the function f(x), we want to evaluate f( - 2). To do this, we need to substitute - 2 for x in each instance of the x-variable.
f(x)=3x^2-4x+6
f( - 2)=3( - 2)^2-4( - 2)+6
f(- 2)=3(4)-4(- 2) +6
f(- 2)=12-4(- 2) +6
f(- 2)=12+8+6
f(- 2)=26