1) 9m^2 - 20m - 21 = 0 2) 10x^2 - 4x -32 = 0
m^2 - (20/9)m + 100/81 = 189/81 + 100/81 (m-10/9)^2 = 289/81 x^2 -.4 x = 3.2 x^2 - .4 x + .04 = 3.2 + .04 (x-.2)^2 = 3.6
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