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x² - 3x = 3x² - 4x
0 = 3x² - 4x - x² + 3x
0 = 2x² - x
2x² - x = 0 Sacamos factor comun x
x(2x - 1) = 0 Tiene 2 soluciones
x = 0
o
2x - 1 = 0
2x = 1
x = 1/2
Solucion
(0 , 1/2)
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5x² + 4 = 2( x + 2)
5x² + 4 = 2x + 4
5x² - 2x = 4 - 4
5x² - 2x = 0 Sacamos factor comun x
x (5x - 2) = 0 Tiene 2 soluciones
x = 0
o
5x - 2 = 0
5x = 2
x = 5/2
Solucion.
(0 , 5/2)
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(4x - 1)(2x + 3) = (x + 3)(x - 1)
8x² - 2x + 12x - 3 = x² - x + 3x - 3
8x² + 10x - 3 = x² + 2x - 3
8x² + 10x - 3 - x² - 2x + 3 = 0
7x² + 8x = 0 Sacamos factor comun x
x (7x + 8) = 0 Tiene 2 soluciones
x = 0
o
7x + 8 = 0
7x = - 8
x = - 8/7
Solucion.
(0 , - 8/7)