SOLUTION: if f(x)=x^2+4x-12 and g(x)=2x+12 how can i calculate C,which is a point on y axis and on the graph of f(x) in the second quadrant

Algebra ->  Quadratic-relations-and-conic-sections -> SOLUTION: if f(x)=x^2+4x-12 and g(x)=2x+12 how can i calculate C,which is a point on y axis and on the graph of f(x) in the second quadrant      Log On


   

Question 964900: if f(x)=x^2+4x-12 and g(x)=2x+12
how can i calculate C,which is a point on y axis and on the graph of f(x) in the second quadrant
Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
That description relies on f(x) and one or both of its roots, but does not rely on g(x).
Also, for C on the y axis, C is BETWEEN quadrant 1 and quadrant 2; or BETWEEN quadrant 3 and quadrant 4.

f%28x%29=x%5E2%2B4x-12
ON the y axis, x=0.
f%280%29=0%2A0%2B4%2A0-12
f%280%29=-12

Point C must be (0,-12).