y=1/4x^2-x

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Solution for y=1/4x^2-x equation: 


x in (-oo:+oo)

y = (1/4)*x^2-x // - (1/4)*x^2-x

x-((1/4)*x^2)+y = 0

(-1/4)*x^2+x+y = 0

x-1/4*x^2+y = 0

DELTA = 1^2-(-1/4*4*y)

DELTA = y+1

y+1 = 0

y+1 = 0 // - 1

y = -1

DELTA = 0  <=>  t_1 = -1

x = -1/(-1/4*2) i y = -1

x = 2 i y = -1

( x = ((y+1)^(1/2)-1)/(-1/4*2) or x = (-(y+1)^(1/2)-1)/(-1/4*2) ) i y > -1

( x = -2*((y+1)^(1/2)-1) or x = 2*((y+1)^(1/2)+1) ) i y > -1

y+1 > 0

y+1 > 0 // - 1

y > -1

x in { 2, -2*((y+1)^(1/2)-1), 2*((y+1)^(1/2)+1) }

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