Using Square Roots

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What is a square root?

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A square root of a number x is a value y such that y² = x. For example, the square root of 9 is 3, since 3² = 9.

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How do you simplify a square root?

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What is the principal square root?

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The principal square root is the non-negative square root of a number. For example, the principal square root of 16 is 4.

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What does it mean to solve an equation involving square roots?

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To solve an equation involving square roots means to isolate the variable and find its value(s) that satisfy the equation.

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What is a radical expression?

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How do you express a number in radical form?

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What is the difference between rational and irrational numbers?

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