How can a radical equation be verified algebraically without a calculator?

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In summary, a radical equation is an equation with a variable under a radical symbol. To solve it, isolate the radical term, square both sides, and use algebraic principles. It is important to verify radical equations to ensure valid solutions and avoid common mistakes such as forgetting to check for extraneous solutions or squaring incorrectly. A helpful tip is to plug solutions back into the original equation for verification.
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mathdad
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Verify that both sides of the radical equation agree without using a calculator. See picture. How can this be done algebraically?

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You asked this question before:

https://mathhelpboards.com/pre-calculus-21/radical-equation-1-a-23550.html
 
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It's good to know that this site keeps a record of posted questions as reference notes.
 

What is a radical equation?

A radical equation is an equation that contains a variable under a radical symbol, such as a square root or cube root.

How do you solve a radical equation?

To solve a radical equation, you first need to isolate the radical term on one side of the equation. Then, you can square both sides of the equation to eliminate the radical. Finally, solve for the variable by using basic algebraic principles.

Why is it important to verify radical equations?

Verifying radical equations is important to ensure that the solutions obtained are valid. This is because sometimes when solving radical equations, extraneous solutions may arise, which are values that do not satisfy the original equation.

What are some common mistakes when verifying radical equations?

One common mistake when verifying radical equations is forgetting to check for extraneous solutions. Another mistake is not squaring both sides of the equation correctly, resulting in incorrect solutions.

Are there any tips for verifying radical equations?

Yes, a useful tip for verifying radical equations is to always check your solutions by plugging them back into the original equation. This will help catch any extraneous solutions and ensure the validity of your answers.

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