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20x^2 - 27x - 14 = 0 => Aplicando aspa simple
5x 2 --> 8x
4x - 7 ---> - 35x
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- 27x
( 5x + 2 )( 4x - 7 ) = 0
5x + 2 = 0 ; 4x - 7 = 0
5x = -2 4x = 7
x = -2/5 x = 7/4