Q25. - Algebra 2

Question

Solve each equation by graphing. If exact roots cannot be found, state the consecutive integers between which the roots are located.

 

$x^2-9x=-18$

Step-by-Step Solution

Answer

The solutions to the equation $x^2-9x=-18$ are x=3,6.

Step 1. Given Information.

Given to solve the equation $x^2-9x=-18$ by graphing. And if the exact roots cannot be found, the consecutive integers between which the roots are located are to be determined.

Step 2. Explanation .

A quadratic equation has a real solution where the graph of the related function crosses or touches the x-axis.

Graphing the given equation using graphing calculator:

From the given graph, the function crosses the x axis at 3 and 6.

Hence the solutions to the equation $x^2-9x=-18$ are x=3,6.

Step 3. Conclusion .

Therefore, the solutions to the equation $x^2-9x=-18$ are x=3,6