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Published byMabel Dixon Modified over 5 years ago

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Goal: Solving quadratic equations by finding square roots

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A number b is a square root of a number a if b 2 = a. A positive number a has two square roots written √a and -√a. For example 2 2 = 4 and (-2) 2 = 4 the two square roots of 4 are √4 = 2 and - √4 = -2. √a is a radical √ is a radical sign The number a beneath the radical symbol is the radicand

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No radicand has a perfect square factor other than 1 There is no radical in a denominator

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Simplify the expression. a. b.● c.

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To simplify an expression, you must eliminate any radical from the denominator.

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Solve x 2 + 1 = 13

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x 2 – 4 = 14 x 2 + 3 = 13

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3y 2 = 24 x 2 + 2 = 26

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2(x – 5) 2 = 12 ½ (p + 4) 2 = 22

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