Given #f(x) = 2x^2+3# and g(x) = 5x+2, how do you find #(3f(2) - 2g(2) ) / (f(1) + g(1) )#?
1 Answer
Apr 15, 2017
Explanation:
#f(color(red)(1))=2(color(red)(1))^2+3=2+3=5#
#f(color(red)(2))=2(color(red)(2))^2+3=8+3=11#
#g(color(magenta)(1))=5(color(magenta)(1))+2=5+2=7#
#g(color(magenta)(2))=5(color(magenta)(2))+2=10+2=12#
#"Substituting values into expression"#
#rArr((3xx11)-(2xx12))/(5+7)#
#=(33-24)/12#
#=9/12#
#=3/4#
