If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x2-x-4=0
We add all the numbers together, and all the variables
x^2-1x-4=0
a = 1; b = -1; c = -4;
Δ = b2-4ac
Δ = -12-4·1·(-4)
Δ = 17
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{-(-1)-\sqrt{17}}{2*1}=\frac{1-\sqrt{17}}{2} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-1)+\sqrt{17}}{2*1}=\frac{1+\sqrt{17}}{2} $
| 340+20x=520 | | 5c-c-2c=4c-3c-c | | x+2÷5=3 | | 5x2-7x-8=0 | | x3+x2=839 | | x^2-12x+3=5 | | 44=58g-8g | | 10x+5=-x+20 | | 10x+5=-5x+20 | | 4x2-25x+13=-6+1 | | 10x+5=-5x-20 | | x2-18x+23=-8x-1 | | x2-15x+15=-8x+5 | | 0.25x+8=3 | | -38=(-16)+a | | x-0.9x=4.73 | | 3.2*x=0.8 | | x2+4x-36=9 | | (4x-1)÷2=x-7 | | 7=17-10x | | x2-2x+2=10 | | 5x11=-17-2x | | (4x-1)÷2=x=7 | | 8(x-20-3(1-x)=9(x+2)+1 | | 11w=7150w= | | 2a5=-9 | | 6x+7=43-4x | | (3y-7)=(3y+1) | | -5/7+4m/14=2 | | 35-4y=5-7y | | 4x-9=9x+10 | | 4y+8=-22-2y |