Sec 7.1-Focus - a x 2 – 9x 20 = b x 2 12x 35 = c x 2 –...

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Quadratic Equations page 7.1 - 15 Section 7.1 Focus Exercises 1. Use the Zero Product Principle to solve each equation. a) (x + 3)(x 7) = 0 b) (x 2)(x 4) = 0 c) (4x 5)(2x + 9) = 0 d) (2x + 3)(5x 6) = 0 e) - 2x(x + 5) = 0 f) 3x(9x 5) = 0 g) (x + 8)(x 8) = 0 h) (2x 3)(2x + 3) = 0 2. Factor the polynomial and use the Zero Product Principle to solve each equation. a) x 2 25 = 0 b) x 2 49 = 0 c) 6x 2 54x = 0 d) - 3x 2 + 12x = 0
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Quadratic Equations page 7.1 - 16 3. Factor the polynomial and use the Zero product Principle to solve each equation.
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Unformatted text preview: a) x 2 – 9x + 20 = b) x 2 + 12x + 35 = c) x 2 – x – 90 = d) x 2 + x – 42 = e) 4x 2 + 7x – 15 = f) 2x 2 – 13x + 15 = g) 4x 2 – 9x – 9 = h) 6x 2 + 14x + 4 = Quadratic Equations page 7.1 - 17 4. Solve each quadratic equation by first having one side become 0. Check your answers to verify that they are solutions. a) x 2 + 2x – 4 = 59 b) x 3 + 23x 2 = 50x c) (x + 6)(x – 7) = - 40 d) x 2 – 4x = 3x – 10 e) x = 3x 2 – 10 f) x 2 – x = 18 – 4x...
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