2x^(2)-sqrt(3x+9)=0

Which of the following are quadratic equations? (i) x-3/x=x^2 (ii) 2x^2-sqrt(3)x+9=0 (iii) x^2-2x-sqrt(x)-5=0

Without solving , comment upon the nature of roots of each of the following equations : (i) 7x^(2)-9x+2=0 (ii) 6x^(2)-13x+4=0 (iii) 25x^(2)-10x+1=0 (iv) x^(2)+2sqrt(3)x-9=0 (v) x^(2)-ax-b^(2)=0 (vi) 2x^(2)+8x+9=0

(4) sqrt(3)x^(2)+2x-sqrt(3)=0

Find the nature of the roots of the following quadratic equations. If the real roots exist find them. x^2-2sqrt(3x)-9=0

Determine the nature of the roots of the quadratic equation : 2x^(2) + 5 sqrt(3) x + 9 = 0 .

Solve the equation sqrt((6-x))(3^(x^(2)-7.2x+3.9)-9sqrt(3))=0

Solve the equation sqrt((6-x))(3^(x^(2)-7.2x+3.9)-9sqrt(3))=0

Solve the equation sqrt((6-x))(3^(x^(2)-7.2x+3.9)-9sqrt(3))=0

Solve the equation sqrt((6-x))(3^(x^(2)-7.2x+3.9)-9sqrt(3))=0

Solve the equation sqrt((6-x))(3^(x^(2)-7.2x+3.9)-9sqrt(3))=0