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Solving Quadratics

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x^2 - 20x + 19 = 0

x = 1 and 19

x^2 + 4x - 45 = 0

x = -9 and 5

x^2 - 11x + 28 = 0

x = 4, x = 7

3x^2 - 3x = 9

x = 2.3 and -1.3

5x^2 - 5x - 6 = 3x

x = 2.2 and -0.6

x^2 + 4x - 12 = 0

x = - 6 and 2

(x + 2)^2 - 6 = 30

x = 4 and -8

x^2 - 20 = 29

x = 7 and -7

2x^2 - 1 = 7

x = 2 and - 2

4x^2 + 5x - 6 = 0

x = -2 and x = 0.75

x^2 + 4x + 8 = 4

x = - 2