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5.5 part 1 - by finding square roots Example c ax = 2 180 5...

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1 5.5 Notes (part 1) Quadratic Equations Objective Solve quadratic equations by factoring and by finding square roots Zero Product Propert Standard Form: Zero-Product Property: if ab=0, then a = 0 or b = 0. Example: (x+3)(x-7) = 0, then (x+3) = 0 or (x-7) = 0. When you multiply two terms and the product is zero, then one of those terms must be zero 0 2 = + + c bx ax 0 a Example: Solve by Factoring. CHECK: 15 11 2 2 - = - x x You try! 1) 2) 18 7 2 = + x x x x 8 16 2 = Solving by Finding Square Roots You can solve an equation in the form
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Unformatted text preview: by finding square roots Example: c ax = 2 180 5 2 =-x You try! 1) 2) 25 4 2 =-x 24 3 2 = x Word Problem A smoke jumper jumps from 1400 ft. The function describing the height is a) Using square roots, find the time during which the jumper is in free fall if the parachute opens at 1000 ft. b) Solve the equation in part a by factoring. 1400 16 2 +-= t y Homework: p. 266 # 1-19 (odds)...
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