Question

The graph above shows the function g, where g(x)

=k(x+3)(x-3) for some constant k. If g(a-1.2)=0

and a is greater than 0, what is the value of a?

Answer 1

g(3) and g(-3) are 0
so
a-1.2 = 3 or a-1.2 = -3

Answer 2

4.2 or -1.8?

Answer 3

since a>0
a=3+1.2

Answer 4

k

Answer 5

so 4.2?