Question

Equação de 2 grau facil

a) x/3 + 1 = x

b) (x-2) ( 2x + 1 ) - x = 1 - 2x (2-x)

c) $\frac{( 3 + 2 x )}{4} - \frac{( 3x - 2 ) }{2} = 0$

Answer 1

a) x + 1 = x ==> x + 3 = 3x ==> 3x - x = 1 ==> 2x = 1 ==> x = 1/2
    3
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b) (x-2) ( 2x + 1 ) - x = 1 - 2x (2-x)

2x² + x - 4x - 2 = 1 - 4x + 2x²

2x² - 3x + 4x + 2x² = 1 +2

x = 3