If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x^2-4x-16.5=0
a = 1; b = -4; c = -16.5;
Δ = b2-4ac
Δ = -42-4·1·(-16.5)
Δ = 82
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-4)-\sqrt{82}}{2*1}=\frac{4-\sqrt{82}}{2} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-4)+\sqrt{82}}{2*1}=\frac{4+\sqrt{82}}{2} $
| 3/5(39x-15)=72 | | v/4-3=5v= | | 9(p-3)=-18 | | V4a=0 | | -5x-37=4x+44 | | 3x-14=-4x+28 | | 2q–6=0 | | 4x-25=8x-53 | | 9=a1.5 | | -x+4=-6x-6 | | 5=(1.12^n) | | s-4.11=18.5 | | -2x-17=8x+63 | | (7x+8x)^0=1 | | 8m+6=70m= | | 24=1.5^t | | 9m-14=-8m= | | (7x+8x)^0=7x | | 9x-10+10=70 | | (7x+8x)^0=x | | -3x-19=3x+11 | | (7x+8x)^0=0 | | 5k+2=6k= | | -9x+30=7x-34 | | (8)/3x+(x-6)/3=2 | | 6x-27=-5x+39 | | 11x-11x+8=20x-11x+44 | | 8a-(15-3.2)=a+(5^2-13) | | -4x+30=3x-33 | | 7t-2t=-2 | | 4x(x-8)+45=5(5x-7/10)+4x | | 7x-69=-2x+12 |