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EXAMPLE 1 Use properties of square roots Simplify the expression.
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GUIDED PRACTICE GUIDED PRACTICE for Example 1 .
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GUIDED PRACTICE GUIDED PRACTICE for Example 1 = = = =
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EXAMPLE 2 Rationalize denominators of fractions. Simplify (a)
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EXAMPLE 2 Rationalize denominators of fractions.
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EXAMPLE 3 Solve a quadratic equation Solve 3x2 + 5 = 41. 3x2 + 5 = 41 Write original equation. 3x2 = 36 Subtract 5 from each side. x2 = 12 Divide each side by 3. Take square roots of each side. Product property Simplify. The solutions are and
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EXAMPLE 4 Standardized Test Practice SOLUTION Write original equation. (z + 3)2 = 35 Multiply each side by 5. Take square roots of each side. Subtract 3 from each side. The correct answer is C.
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GUIDED PRACTICE for Examples 2, 3, and 4 GUIDED PRACTICE Simplify the expression.
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for Examples 2, 3, and 4 GUIDED PRACTICE 12 13 5x2 = 80 14 z2 – 7 = 29
Homework 4.5 :
Homework 4.5 Pages: 269 – 271
Exs. 4 – 16 even, 20, 24, 28, 34, 44, 45