Question

Solve the equation by graphing. $x^2 - 10x + 21 = 0$ First, graph the associated parabola by plotting the vertex and four additional points, two on each side of the vertex. Then, use the graph to give the solution(s) to the equation. If there is more than one solution, separate them with commas.

          Solve the equation by graphing.
$x^2 - 10x + 21 = 0$
First, graph the associated parabola by plotting the vertex and four additional points, two on each side of the vertex.
Then, use the graph to give the solution(s) to the equation.
If there is more than one solution, separate them with commas.

Solve the equation by graphing.
x^2 - 10x + 21 = 0
First, graph the associated parabola by plotting the vertex and four additional points, two on each side of the vertex.
Then, use the graph to give the solution(s) to the equation.
If there is more than one solution, separate them with commas.

Added by Lisa S.

Elementary and Intermediate Algebra

Alan S. Tussy, R. David Gustafson 5th Edition

Instant Answer

Solved by Expert Gregory Higby

Step 1

The vertex form of a quadratic equation is given by: y = a(x - h)^2 + k where (h, k) is the vertex of the parabola. So, let's rearrange the given equation: 10x + 21 = 0 10x = -21 x = -21/10 Substituting this value of x in the equation, we get: y = 10(-21/10) + Show more…

Show all steps

Thanks for your feedback!

Solve the equation by graphing 10x + 21 = 0. First, graph the associated parabola by plotting the vertex and four points, two on each side of the vertex. Then, use the graph to determine the solution(s) to the equation. If there is more than one solution, separate them with commas. Solution(s): x = 0