# #55. How to Solve a Nonlinear System an Example with Four Solutions | Summary and Q&A

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October 14, 2020
by
The Math Sorcerer
#55. How to Solve a Nonlinear System an Example with Four Solutions

## TL;DR

Learn how to solve a non-linear system of equations using the addition or elimination method.

## Key Insights

• 🚱 The addition or elimination method is a useful technique for solving non-linear systems of equations.
• 🍉 Multiplying one equation by a number and adding it to another cancels out specific terms, simplifying the system.
• 🧑‍🏭 Factoring out variables helps simplify equations and determine possible solutions.
• 🚱 Checking both equations in a non-linear system is essential to ensure consistency and accuracy in finding the solutions.

## Transcript

in this problem we have a non-linear system of equations and we have to find the solutions so there's a couple ways to do this i think maybe we should try to do it with what's called the addition or elimination method so the way that works is basically you multiply one equation by a number and then add it to another equation let's maybe multiply th... Read More

## Questions & Answers

### Q: What is the addition or elimination method used for in solving non-linear equations?

The addition or elimination method is a technique to simplify and solve non-linear equations by multiplying one equation by a number and adding it to another equation to cancel out terms.

### Q: How do you solve for x in a non-linear system of equations using the addition or elimination method?

To solve for x, you multiply one equation by a number and add it to the other equation. This eliminates certain terms, allowing you to solve for x and obtain possible x-values as solutions.

### Q: What is the purpose of factoring out an x in the equation x^2 + 5x = 0?

Factoring out an x helps simplify the equation by expressing it in the form x(x + 5) = 0, which allows you to set each factor equal to zero and find the possible x-values that satisfy the equation.

### Q: Why is it necessary to check both equations when finding the solutions to the non-linear system?

Both equations need to be checked because they both contain y^2 terms. This means that when finding the square root of y^2, there are two possible answers, and checking both equations ensures consistency and accuracy in determining the solutions.

## Summary & Key Takeaways

• The content provides a step-by-step explanation of solving a non-linear system of equations using the addition or elimination method.

• The method involves multiplying one equation by a number and adding it to another equation to cancel out certain terms.

• The solutions to the system of equations are ordered pairs (x, y), which are obtained by finding the values of x and substituting them back into the equations to solve for y.