Answer :
2/7 = ((6*x)/4)*x+17 // - ((6*x)/4)*x+17
2/7-(6*x)/4)*x)-17 = 0
(-3/2)*x^2+2/7-17 = 0
-3/2*x^2 = 117/7 // : -3/2
x^2 = -78/7
2/7-(6*x)/4)*x)-17 = 0
(-3/2)*x^2+2/7-17 = 0
-3/2*x^2 = 117/7 // : -3/2
x^2 = -78/7