Quadratic Equations and Prime Numbers

Apr 30th, 2015
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Solving the quadratic equations using the FOIL method makes the equations easier for me to understand. The Foil method, multiplying the First, Outer, Inner and Last numbers, breaks down the equation a little further so you understand where some of your numbers are coming from, plus it helps me to check my work. Equation (a.) x^2 – 2x – 13 = 0

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Quadratic Equations and Prime NumbersSolving the quadratic equations using the FOIL method makes the equations easier for me to understand. The Foil method, multiplying the First, Outer, Inner and Last numbers, breaks down the equation a little further so you understand where some of your numbers are coming from, plus it helps me to check my work. Equation (a.) x^2 2x 13 = 0X^2 2x = 13 (step a)4x^2 8x = 52 (step b, multiply by 4)4x^2 8x + 4 = 52 + 4 (step c, add to both sides the square of original coefficient)4x^2 8x + 4 = 56 2x + 2 = 7.5 (d, square root of

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