you get the x value that satisfies the equation
try others out in the same manner
I'll do one of them . . .
Suppose we have a graph of
What lines would you draw on it to solve the following eqautions?
Draw the line . . . . why?
To find the intersections of the parabola and the line,
. . we have: .
The -coordinates of the intersections are the roots of the quadratic equation.