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In steps explain how to work 100x^2+180x+81

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Panoyinidn
100x² + 180x + 81
100x² + 90x + 90x + 81
(10x + 9)(10x + 9)
           or
100x² + 180x + 81 = 0
x = -180 +/- √(180² - 4(100)(81))
                      2(100)
x = -180 +/- √(32400 - 32400)
                        200
x = -180 +/- √(0)
              200
x = -180 +/- 0
           200
x = -180
       200
x = -9/10
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