Explore BrainMass

Quadratic Equations

I'm thinking of two numbers. Their sum is 10 and their product is 21. What are the two numbers?

The quadratic equation for this problem would be: x^2 - 10x + 21 = y. By graphing, we find that the x intercepts are at (7,0) and (3,0), meaning the solutions are 7 and 3.

Please post attachment with a graph of the solution.

Solution Summary

Quadratic equations are investigated. The solution is detailed and well presented. The response was given a rating of "5/5" by the student who originally posted the question.