How do you solve x^2-10x=-24 by graphing?

1 Answer
Jul 21, 2018

x=4, x=6

Explanation:

Well, you set it equal to 0:
x^2-10x+24

Graph it:
graph{x^2-10x+24 [-10, 10, -5, 5]}

Tips on determining the vertex:
x=-b/(2a)

For the y-coordinate, plug the x-coordinate into the equation and solve for y

Write the equation in the vertex form:
y=a(x-h)^2+k
Where (h,k) is the vertex

y=(x-5)^2-1, so essentially graph the parent quadratic function y=x^2, 5 units to the right and one unit down

Look at the zeroes or x-intercepts:
x=4 and 6