Escreva as equações na forma ax² + bx+c = oe
classifique-as em completas ou incompletas.
a) 2x² - 6x +18 = 20
b) 5x² - 2x +9= 3(3 + 2x)
c) 19 = x²
d) x²(x-3) = 10x + 6x² + x³
e) x+1=3x²-5
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