Math 3-1: Warm-up.

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Presentation transcript:

Math 3-1: Warm-up

Objective: How to find the square roots of perfect squares. Math 3-1: Square Roots Objective: How to find the square roots of perfect squares.

Vocabulary perfect square – a rational number whose square root is a whole number. 25 is a perfect square because its square root is 5. square root – one of the two equal factors of a number. square root of 144 = 12 since 122=144 radical sign – the symbol used to indicate a nonnegative square root ( ). principal square root – a positive square root.

Find a Square Root

Use Square Roots to Solve an Equation Take the square root of each side of the equation Every positive number has both a positive and negative square root

Solve Equations

Math 3-2: Estimating Square Roots Objective: How to estimate square roots.

≈ about equal to (estimate) Most numbers are not perfect squares. You can estimate square roots for these numbers.

Assignment Pgs. 118-119 (14-36e; 38&40ec)