L5-7 Objective: Students will be able to solve quadratics by using the quadratic formula.

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Presentation transcript:

L5-7 Objective: Students will be able to solve quadratics by using the quadratic formula.

Practice 1. x² - 4x + 3 = 0 2. 2x² + 5x – 7 = 0 3. x² + 10x = -25

L5-8 Objective: Students will solve equations by completing the square

Find the missing value to complete the square: x2 + 20x + . Completing the Square Solve x2 – 12x + 36 = 9. Find the missing value to complete the square: x2 + 20x + .

Completing the Square Solve x2 + 4x + 1 = 0. Solve x2 + 6x + 12 = 0.

Write y = x2 + 5x + 2 in vertex form. Completing the Square Solve 2x2 = – 7x + 1. Write y = x2 + 5x + 2 in vertex form.

Practice Solve by completing the square

Review Graph y = 2x² - 4x

Graph y = (x-3)² + 5

Graph y = ( x + 2)² - 3

Solve x² + 10x + 24 = 0 Factor 4x² + 12x + 40 x² - 6x – 16 Simplify 1. (3 – i)(2 + 3i) 2. (2 + i) + ( 3 – 2i)

Homework L5.7 (P 289) #18-24e 28-32e 52-56e L5.8 (P 297) #12-34e