Explanation:
#(g-f)(x)=g(x)-f(x)#
#color(white)(xxxxxx)=6x-(4-x^2)#
#color(white)(xxxxxx)=x^2+6x-4#
#"to evaluate "(g-f)(3)" substitute x = 3 into "(g-f)(x)#
#(g-f)=(color(red)(3))^2+(6xxcolor(red)(3))-4=23#
Algebra 2 Question Ana G. please help with this algebra 2 question Follow • 2 Add comment More Report
1 Expert Answer
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Daniel T. answered • 10/18/16
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(g-f)(3) = g(3)-f(3)
g(x) = 6x
g(3) = 6(3) = 18
f(x) = 4-x2
f(3) = 4-(3)2 =4-9 = -5
g(3)-f(3) = 18 - (-5) = 18+5 = 23
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