Question 973299
(x+3)=0 zero at -3
(x-5)=0 zero at 5
(x+3)(x-5)=0 for f(2)=-30, let a be variable to adjust to -30:
a(2+3)(2-5)=-30
a(5)(-3)=-30
a(-15)=-30
a=2
The entire equation:
{{{f(x)=(2)(x+3)(x-5)}}}
{{{f(x)=(2x+6)(x-5)}}}
{{{f(x)=2x^2-4x-30}}}