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Homework Answers • x = 3 & -4 • x = 6 & -5 • x = -1 & -7 • x = 1 & 9 • x = 6 & -2 • x = -8 • x = -10 & 10 • x = -3 & -5 • x = 2 & 10 • x = -8 & -4 • x = -4 & 4 • x = -8 & 7 • x = 8 & -3 • x = 4 • x = 4 • x = -6 & -8 • x = 8 & -3 • x = 10 & -5 • x = 12 & -2 • x = -7 & 2

Use Square Roots to Solve Quadratic Equations TUESDAY, APRIL 3, 2012 OBJECTIVE: I CAN FIND SOLUTIONS TO QUADRATIC EQAUATIONS BY USING SQUARE ROOTS.

Use Square Roots to Solve Quadratics • If there is not an x term, we can use square roots to find the zeros. • Goal: get x2 alone on one side of the equation. Then you’ll be able square root each side to find x. • When you take the square root of a number, your solution will have a positive version and a negative version. We can abbreviate this with the sign: ± 2x2 = 8 x2 = 4 x = ± √4 x = ± 2 (check your answer by putting the answers into the original equation)

Use Square Roots to Solve Quadratics x2 – 18 = -9

Use Square Roots to Solve Quadratics x2 + 12 = 5

Use Square Roots to Solve Quadratics x2 = 9

Use Square Roots to Solve Quadratics x2 – 35 = 1

Use Square Roots to Solve Quadratics 3x2 – 11 = 7

Use Square Roots to Solve Quadratics 6(x – 4)2 = 42

Use Square Roots to Solve Quadratics 3(x + 5)2 = 24

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