Operations with Radicals

Front

What is a radical in mathematics?

Back

A radical is a symbol used to represent the root of a number, most commonly the square root. For example, √4 represents the square root of 4.

Tags

CCSS.8.NS.A.1

Front

How do you simplify √(a * b)?

Back

√(a * b) = √a * √b, provided that a and b are non-negative.

Front

What is the value of √(16)?

Back

4, because 4 * 4 = 16.

Tags

CCSS.8.EE.A.2

Front

How do you add √a and √b?

Back

You can only add √a and √b if a = b. In that case, √a + √b = (√a + √b) = n√a, where n is the number of identical radicals.

Front

What is the process to rationalize the denominator of 1/√a?

Back

Multiply the numerator and denominator by √a to get (√a)/(a).

Tags

CCSS.HSN.RN.A.2

Front

What is the value of √(x^2)?

Back

|x|, because the square root of a squared number is the absolute value of that number.

Front

How do you subtract √a from √b?

Back

You can only subtract √a from √b if a = b. In that case, √b - √a = (√b - √a) = n√a, where n is the number of identical radicals.

Front

What is the product of √a and √b?

Back

√a * √b = √(a * b).

Front

How do you simplify √(a^2)?

Back

√(a^2) = |a|.

Tags

CCSS.HSN.RN.B.3

Front

What is the sum of √2 and √2?

Back

2√2, because √2 + √2 = 2√2.