If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x^2-90x-2250=0
a = 1; b = -90; c = -2250;
Δ = b2-4ac
Δ = -902-4·1·(-2250)
Δ = 17100
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{17100}=\sqrt{900*19}=\sqrt{900}*\sqrt{19}=30\sqrt{19}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-90)-30\sqrt{19}}{2*1}=\frac{90-30\sqrt{19}}{2} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-90)+30\sqrt{19}}{2*1}=\frac{90+30\sqrt{19}}{2} $
| 15x-13=x+15 | | 3(x+2)=5(2x+7) | | x/5-5/6=3/2 | | 4b+(5b-7)=38 | | 30/x-20/x-3+4=0 | | 7/2x=-1/8 | | 5x+15-4x+8=13 | | 3x-5x+6=x-6+12 | | 7y/122=5y/8-2 | | 6-9x=-4 | | 1/3*x=2/3 | | (z+1)^2=-9 | | 70=-v+236 | | x^2+16x=161 | | 288=-u+124 | | x/34=7/17 | | 18x(-8-7)=67 | | 2^4x−5⋅32^x+1=2^6x−7 | | 4x-8+9=2(x+9)+10 | | |m|−6=3 | | 8(k-2)=32+2k | | -4x+2x=-1-3x | | (8x-1)=(6x+9) | | 4n-2=6n= | | 7n-2=-7n-2 | | 60+25x=42.95+42.95x | | -4x+2x=-2-3x | | (4x-3)(7x-5)=A | | -2(3z+1)-20=4 | | (4x-3)(7x-5)=X | | (x+6)(x-1)=(x+1)^2 | | 144=-8(-3-5x) |