If it's not what You are looking for type in the equation solver your own equation and let us solve it.
13x^2-4x-9=0
a = 13; b = -4; c = -9;
Δ = b2-4ac
Δ = -42-4·13·(-9)
Δ = 484
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{484}=22$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-4)-22}{2*13}=\frac{-18}{26} =-9/13 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-4)+22}{2*13}=\frac{26}{26} =1 $
| 6h-7=38 | | m-15/7=8 | | -9r=-6–3r | | d-4=4d-22 | | -4(v-2)=7v+30 | | 3(2x+5)-5(-3x+1)=-53 | | 100-100+100+1000=5t+15t | | X/6+x/15=7/5 | | A=4/3(h-85) | | 8-5(1-9z)=20 | | 10(s-92)=30 | | 8m+6=10m | | 8a+1-4=7a-1 | | 8x^2=18x+5 | | 0=13x^2-4x-9 | | 2(3x+4)=5(6-7) | | 2z-1/3)-(3z+1/5)=1 | | (8x+11)(12x^2-5x-2)=0 | | 2x^2-320x+10880=0 | | -8=(y/9) | | 4(4y+4)=48 | | 5w+8w-4=13w-12+8 | | 2(3x+5)=2x+17 | | 18t^2+6t=0 | | 6=2x-16/4 | | 2p-3=4(p+1) | | 3x-5=-8x+17 | | x/4+8-6=5 | | (2x-10)-(x-16)=8 | | -(3p-6)=7p-16+p | | 2(5x+3)+24X=55-x | | (X-15)-(7-2x)=14 |