In the proof of the Law of Cosines, the equation c ^ 2 = h ^ 2 + (b - x) ^ 2 was created using the Pythagorean theorem. Which equation is a result of expanding (b - x) ^ 2 ?

Where m is the slope of the line and b is the y-intercept of the line, or the y-coordinate of the point at which the line crosses the y-axis. to write an equation in slope-intercept form, given a graph of that equation, pick two points on the line and use them to find the slope. this is the value of m in the equation.