x^2-7=9/4x

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Solution for x^2-7=9/4x equation: 


x in (-oo:+oo)

x^2-7 = (9/4)*x // - (9/4)*x

x^2-((9/4)*x)-7 = 0

x^2+(-9/4)*x-7 = 0

x^2-9/4*x-7 = 0

DELTA = (-9/4)^2-(-7*1*4)

DELTA = 529/16

DELTA > 0

x = ((529/16)^(1/2)+9/4)/(1*2) or x = (9/4-(529/16)^(1/2))/(1*2)

x = 4 or x = -7/4

x in { -7/4, 4 }

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