Coloque na forma ax²+bx+c=0a as seguintes equações do 2° grau: a) 4x (x+3) + 9 = 0
b) x (2x-3) = 4x-1
c) (x+4)² = 3 (x+2)
d) (x+1)² - x =7
b) x (2x-3) = 4x-1
c) (x+4)² = 3 (x+2)
d) (x+1)² - x =7
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