If it's not what You are looking for type in the equation solver your own equation and let us solve it.
b^2-12b-28=0
a = 1; b = -12; c = -28;
Δ = b2-4ac
Δ = -122-4·1·(-28)
Δ = 256
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$b_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$b_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{256}=16$$b_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-12)-16}{2*1}=\frac{-4}{2} =-2 $$b_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-12)+16}{2*1}=\frac{28}{2} =14 $
| 6*10*x=180 | | 5/6b=77/8 | | 4(4x-3)+(-6x+7)=16 | | x-x/5=84 | | 5^(2x)+5^(x)-30=0 | | 12+.13x=17+.11x | | 36-12x=12 | | 5*7=11x | | 2(x+3)=4x+24 | | 15x=50-5 | | 8+1/4x=10 | | (x-8)^2=-2 | | |x-8|=5 | | x/1.5=9/4.5 | | -15=-3n5 | | 22q+7q-20q+q=10 | | 27x^2+460x+48=0 | | -7x/4=-35 | | 14z-6z-4z-3z=17 | | 12x=70-10 | | 15n+20n-15n+13n-17n-19=-3 | | 2,000,000+x=1,900,000+1.9x | | G(t)=240(0.75)3 | | 5/8y=-10 | | h=-16(-1/8)^2+38(-1/8)+5 | | 8m-m+8m-13m=-2 | | C(x)=2x+12500 | | 4=-6+2v | | (20+2x)(30+2x)=936 | | 4x+-4=-4+-6x | | 8m+-m—8m-13m=-2 | | 26=3v+5 |