Question

Given that g(x) = 17x - x2; find all values of a such that g(a) = 72

Answer 1

g(a)=72=17a-a^2
-a^2 + 17a -72=0
a^2 -17a +72=0
solve quadratic equation for a

Answer 2

g(a)=17a-a^2=72
a^2-17a+72=0
a=9 or a=8