Question

If f(x)=2x=2x+1 and g(x)=2x^2-5
find f(5) and g(3)

Answer 1

f(5) = 11

g(3) =13

Explanation:

f(5) means put 5 in for x

f(x) = 2x+1

f(5) = 2(5)+1

= 10+1

= 11

g(3) means put 3 in for x

g(x)=2x^2-5

g(3) = 2(3)^2 -5

= 2(9) -5

= 18 -5

=13