Understanding Radical Equations

The video tutorial explains how to solve a radical equation by isolating the radical, squaring both sides, and using the quadratic formula. It highlights the importance of checking for extraneous solutions, which can arise when squaring both sides of an equation. The tutorial demonstrates solving the equation and verifying the solutions to ensure they are not extraneous.

What is the first step in solving the radical equation 2x - 1 = √(8 - x)?

• Subtract x from both sides

• Multiply both sides by 2

• Square both sides of the equation

• Add 1 to both sides

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CCSS.HSA.REI.A.2

Why is it important to be cautious when squaring both sides of an equation?

• It can simplify the equation too much

• It can change the variable

• It can introduce extraneous solutions

• It can make the equation more complex

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CCSS.HSA.REI.A.2

What is an extraneous solution?

• A solution that satisfies a different equation

• A solution that does not satisfy the original equation

• A solution that is not a real number

• A solution that satisfies the original equation

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CCSS.HSA-REI.B.4B

What form is the equation rewritten into before using the quadratic formula?

• Logarithmic form

• Exponential form

• Standard quadratic form

• Linear form

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CCSS.HSA.REI.A.2

Which formula is used to solve the quadratic equation derived from the radical equation?

• Pythagorean theorem

• Quadratic formula

• Binomial theorem

• Factorial formula

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CCSS.HSA-REI.B.4B

What are the solutions obtained from the quadratic formula in this context?

• x = 1 and x = -1

• x = 2 and x = -2

• x = 14/8 and x = -1

• x = 3 and x = -3

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CCSS.HSA.REI.A.2

How do you verify if a solution is extraneous?

• By checking if it is a positive number

• By checking if it satisfies any equation

• By checking if it is a negative number

• By checking if it satisfies the original equation

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CCSS.HSA.REI.A.2

What is the correct solution for the original radical equation?

• x = 0

• x = 14/8

• x = -1

• x = 2

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CCSS.HSA-REI.B.4B

What should you do after finding the solutions to the quadratic equation?

• Assume both are correct

• Verify each solution against the original equation

• Choose the positive solution

• Choose the negative solution

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CCSS.HSA.REI.A.2

What is encouraged at the end of the tutorial?

• To ignore extraneous solutions

• To memorize the solutions

• To find more solutions

• To test the solutions independently

Tags

CCSS.HSA.REI.A.2