Question

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

$x^2+3x=28$

Short answer

The solutions to the equation $x^2+3x=28$ are x=-7,4

Step-by-step solution

Step 1. Given Information.

Given to solve the equation $x^2+3x=28$ 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 -7 and 4.

Hence the solutions to the equation $x^2+3x=28$are x=-7,4.

Step 3. Conclusion.

Therefore, the solutions to the equation $x^2+3x=28$ are x=-7,4