If it's not what You are looking for type in the equation solver your own equation and let us solve it.
k^2-6k-72=0
a = 1; b = -6; c = -72;
Δ = b2-4ac
Δ = -62-4·1·(-72)
Δ = 324
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$k_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$k_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{324}=18$$k_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-6)-18}{2*1}=\frac{-12}{2} =-6 $$k_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-6)+18}{2*1}=\frac{24}{2} =12 $
| a+4=4a+4 | | 5x-4=52-x | | a+4=4a+3 | | 2x+1=-2x+41 | | 10x+-10=10x+8+8x | | F9x)=18 | | 18d+24d+17d=200 | | 7x+8=-62-3x | | X×X+7x+12=0 | | -4(x+0,5)+2=2*(3-2x) | | b−1=15 | | 7^x=1/4 | | 12x=67 | | ((n-2)*180)/n=120 | | (n-2)*180/n=120 | | 3(3y-6)=0 | | -8x-8+3x-6=-3+2 | | 4t+1.2=8.8 | | x^2+8=84 | | x^2-8=84 | | 29.5+5.9y=53.1 | | 10b-4=1.5 | | 10n+17=27 | | 7/8w=1/2+3/4w | | 7+v=30 | | 21x-5=19x+5 | | 2(4-3x-3x)+3(3x+9)=11 | | 5r+14=-1 | | -7.5x+0.25=-2.75 | | x-5x10=9+2x-7 | | 9x-20=8-5x | | 17x+2=16x+9 |