If it's not what You are looking for type in the equation solver your own equation and let us solve it.
d2-15d+56=0
We add all the numbers together, and all the variables
d^2-15d+56=0
a = 1; b = -15; c = +56;
Δ = b2-4ac
Δ = -152-4·1·56
Δ = 1
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$d_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$d_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{1}=1$$d_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-15)-1}{2*1}=\frac{14}{2} =7 $$d_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-15)+1}{2*1}=\frac{16}{2} =8 $
| -2t-8t=60 | | c/5=17 | | 3x-(-8/5)=4 | | -25m=-175 | | 7-6v+5=6 | | n2+12=8n | | 27=-7(r-1)+13 | | 14x=-x2-49 | | 8p-10=4(2p+6)+(9+p) | | 2/5x-5=1/5(7x+10) | | -0.2x-4=44x-x | | 7(b+10)=-14 | | 0.8x+0.2=0.65(100) | | b2+11b+24=0 | | 4x+6=-19x+15+12x | | n2+n-6=0 | | 15=4s+s | | -2(v-6)=8 | | 12x+15=6x-3 | | 4a+1/7=2a/3 | | -4x-104=200 | | -48=8b-2b | | 2w–3=1 | | 3(x+5)-(2×-4)=24 | | 2j+3÷3=3j-1÷6 | | 3(7+s)=33 | | 24=15m | | b=2(5,5) | | 3+8y=43 | | (-6+b)(2+7)b=5 | | -90+10x=38+14x | | 3x(2x+3)+2(x-3)=x(6x+1)-7 |