Given #f(x) = 5x^2 - 4x# and #g(x) = -3x^2 - 8# how do you find (f + g)(2)?
1 Answer
Feb 13, 2016
- 8
Explanation:
begin by adding f(x) and g(x) together.
# f(x) + g(x) = 5x^2 - 4x -3x^2 - 8 = 2x^2 -4x -8# now (f+g)(2) means evaluating the sum when x = 2
#2x^2 - 4x - 8 = 2(2)^2 - 4(2) - 8 = 8 -8 - 8 = -8#
