X^2-7=0
x^2=7
x=-+√7
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-y^2+6=0
y^2=6
y= -+√6
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3x^2-7=0
x^2= 7\3
x= -+√7\3
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-4x^2+19=0
x^2=19\4
x= -+√19\4
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-0.3y^2+0.39=0
y^2=0.39\0.3
y^2 = 13/10
y= √13/10
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3/2 x^2 -9\4 = 0
6/4 x^2 - 9/4=0
x^2= 3/2
x= √3/2
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