Adding and Simplifying Radicals

This lesson covers adding and subtracting radicals and rational expressions. It begins with an introduction to radicals, including square and cube roots, and rational expressions with fractional exponents. The video explains how to treat radicals as like terms for addition and subtraction, and demonstrates simplifying radicals before combining them. It also covers cube roots and how to handle rational expressions by focusing on like exponents. The lesson concludes with examples of combining rational expressions and encourages students to apply these concepts in their assignments.

What are radicals in the context of this lesson?

• Expressions with variables

• Roots such as square roots and cube roots

• Exponents that are whole numbers

• Fractions with exponents

When adding radicals, what must be true for them to be combined?

• They must be different roots

• They must be like terms

• They must have the same coefficient

• They must be simplified

How can the square root of 8 be simplified?

• As 3 times the square root of 2

• As 4 times the square root of 2

• As 2 times the square root of 2

• As 8 times the square root of 1

What is the result of combining 5 cube root of 5 and -10 cube root of 2?

• 15 cube root of 7

• Cannot be combined

• 15 cube root of 10

• 5 cube root of 3

What is the key step in simplifying cube roots?

• Adding the coefficients

• Breaking down the number into a product of cubes

• Identifying perfect squares

• Finding a common denominator

What is the simplified form of the cube root of 250?

• 2 cube root of 125

• 5 cube root of 5

• 10 cube root of 2

• 5 cube root of 2

Tags

CCSS.HSN.RN.A.2

What does a rational expression with a fractional exponent represent?

• A logarithm

• A whole number

• A root, such as a square or cube root

• A polynomial

Tags

CCSS.7.NS.A.1C

How do you add rational expressions with the same fractional exponent?

• By adding the exponents

• By adding the coefficients

• By subtracting the exponents

• By multiplying the coefficients

What is the result of 2x^(1/5) - 8x^(1/5) + 6x^(1/5)?

• 0

• 2x^(1/5)

• 6x^(1/5)

• 10x^(1/5)

Tags

CCSS.HSA.APR.A.1

What is the result of adding x^(1/2) and 3x^(1/2)?

• 4x^(1/2)

• 3x^(1/2)

• x^(1)

• x^(1/2)

Tags

CCSS.HSA.APR.A.1