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+5x+18=90
We move all terms to the left:
x^2-4x+5x+18-(90)=0
We add all the numbers together, and all the variables
x^2+x-72=0
a = 1; b = 1; c = -72;
Δ = b2-4ac
Δ = 12-4·1·(-72)
Δ = 289
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{289}=17$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(1)-17}{2*1}=\frac{-18}{2} =-9 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(1)+17}{2*1}=\frac{16}{2} =8 $
| 2a+3+5a=11 | | 43=9d–2 | | 21=5h-9 | | 2=2-4n-2n | | 12=12+2v−8 12=12+2v−8 12=12+2v−8 12=12+2v−8 12=12+2v−8 12=12+2v−8 | | z-70/6=4 | | 7-8(1+6v)=-16 | | 35+7x=20+9x | | 4x+8x2x=140 | | 7+9f=43 | | 3n-2n+4=5 | | 9(7y+2)=-20-3y | | (10x-6)+(12-4x)=0 | | f/9+27=28 | | 28x=21=-42x-10 | | -2(7b-9)=-22 | | -2n+4n-1=-5 | | w+37/8=6 | | -16=4n-4+2n | | 3x-38=01 | | 2(3x+6)=-11 | | 1+2x=3x+9 | | -3=3-4n-2n | | v-59/3=8 | | w-11=6.8 | | -7f-3-2f=-18 | | 7×x+3=5×x+13 | | 40=8(b-88) | | 2n-4n-3=-3 | | 40=8(b-88$ | | 6s+4-8=-17 | | -4d+2d=27 |