HW Warm-Up Evaluate the expression. HW Lesson 9.1: Solving Quadratic Equations by Finding Square Roots Algebra I.

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Presentation transcript:

HW Warm-Up Evaluate the expression

HW Lesson 9.1: Solving Quadratic Equations by Finding Square Roots Algebra I

HW Definitions Square Root: The square root of a number is one of its two equal factors.   The square root is the INVERSE OPERATION for squaring a number.

HW Finding Square Roots Every positive number has a positive square root and a negative square root. However, negative numbers like -9 have no real square root because the square of a number cannot be negative.  EXAMPLES:

HW Examples

HW Check Your Progress

HW Solving Quadratic Equations A Quadratic Equation is an equation that can be written in the following STANDARD FORM: , where.

HW Examples Evaluate for the given values

HW Check Your Progress Evaluate for the given values

HW When, this equation becomes. To solve quadratic equations of this form, isolate the term. To get by itself, compute the inverse operation of, which is the square root of the number.

HW Examples

HW Check Your Progress

HW Classwork Pg. 507 #8-18 (all)

HW Homework Pg. 507 – #23-75 (Every Other Odd)