Question 48379
Does the point (-2, -5) lie on the graph of {{{f(x) = -7x^2-14x+9}}}?
Write your function in the form:
{{{y = -7x^2-14x+9}}} and substitute x = -2, and y = -5 and see if the two sides are equal.

{{{-5 = -7(-2)^2-14(-2)+9}}} Simplify.
{{{-5 = -7(4)+28+9}}}
{{{-5 = -28+28+9}}}
{{{-5 = 9}}} Not true!

The point (-2, -5) does not lie on the graph of {{{f(x) = -7x^2-14x+9}}}