If it's not what You are looking for type in the equation solver your own equation and let us solve it.
4d^2-13d-12=0
a = 4; b = -13; c = -12;
Δ = b2-4ac
Δ = -132-4·4·(-12)
Δ = 361
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{361}=19$$d_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-13)-19}{2*4}=\frac{-6}{8} =-3/4 $$d_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-13)+19}{2*4}=\frac{32}{8} =4 $
| 6=3(b-4) | | -2×=4x+9 | | 6x2^(N+1)=123 | | 2=4(z+4) | | 6x2^N+1=123 | | n*(n-1)/2=210 | | x=–3,5x=5–3=2 | | 2y+4×(-2)=6 | | 2y+4×-2=6 | | 1.05x=22.50 | | 12-17=13-3x | | 8m/5+7/2=3/10-7m/5 | | x-0.05x=60000 | | Xx2=17 | | -2k+5/7=9/7+6k/7 | | ?x2=17 | | 6x-15+5x-30=-1 | | 5t2-10t-40=0 | | 4.24=x^2/(0.15-x)^2 | | 4.24=x^2/ | | x-11=3x+21 | | -5x/8+1=4+13x/8 | | 5t^2-12t-64=0 | | 4x-2(13)+12=0 | | 92=-2n+7(n+8) | | 2x÷20=5+x | | 7x÷30=5+x | | X+4/3=1/5y | | 6(7-3x)=168 | | 2y+4(-2)=6 | | 10x=2x+56 | | 4(1)-2y+12=0 |