Solve Quadratic Equations by Finding Square Roots Chapter 1.5.

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Solve Quadratic Equations by Finding Square Roots Chapter 1.5

1.5 Vocabulary Square Root r is the square root of s if r 2 = s. Radical The symbol Radicand The ‘s’. Number inside the radical sign Rationalizing the denominator Eliminating radicals from the denominator Conjugates – ex: The product of conjugates is always a rational # Rational – can be written as a fraction Irrational – endless non repeating digits to right of the decimal

Properties of Square Roots

Ex. 1: Simplify each expression

Ex. 2: Rationalize the Denominator

Rationalize the Denominator

Ex. 3: Solve a Quadratic Equation

Ex. 4: Solve a Quadratic Equation