Resolva as equações do 2º grau, sendo U=R:
a) x ² + x ( x - 6 ) = 0
V = {0,3}


b) x ( x + 3 ) = 5 x
V = {0,2}

c) x ( x -3 ) - 2 ( x - 3 ) = 6

V = {0,5}


d) ( x + 5 ) ² = 25

V = {0,-10}

e) ( x - 2 ) ² = 4 - 9x
V = {0,-5}

f) ( x + 1 ) ( x - 3 ) = - 3
V = {0,2}

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