If it's not what You are looking for type in the equation solver your own equation and let us solve it.
7r^2+r-19=0
a = 7; b = 1; c = -19;
Δ = b2-4ac
Δ = 12-4·7·(-19)
Δ = 533
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$r_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$r_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$r_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(1)-\sqrt{533}}{2*7}=\frac{-1-\sqrt{533}}{14} $$r_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(1)+\sqrt{533}}{2*7}=\frac{-1+\sqrt{533}}{14} $
| 13x-1=8x+12 | | (2x-10)+(5x+5)+(3x)=180 | | 0=4-(4/(x-2)^2) | | 36(3x+1)=21(6x-6) | | 8x–3(5x–2)=7–10x | | 3t-42=-42+7t | | y+5=25-3y | | x=130,000+.2x | | -6(-4y+2)-9y=7(y-2)-4 | | 3v-43=5(v-7) | | -14.3=3.2+w/7 | | d=16(5^2) | | 44+7x(11+36)=x | | -3.2x=-19.95 | | 12x=288-4x | | 1/5-x/4=x/2-1/3 | | 80+q=455 | | 12÷x=3 | | m^2-10m-10=0 | | 3x=x2 | | (80+25)q=455 | | 12x+21x+24x=100.50 | | 5v^2+6v-3=0 | | 7x=4x+15. | | 8n^2-8n-8=0 | | 7m^2-26m-5=3 | | (5x-1)(8x+3)=0 | | (c+4)(c-9)=0 | | x-(.20x)=1000 | | 1000=Xx.20 | | 8.5=9.7/z | | (12x-8)÷2=14 |