If it's not what You are looking for type in the equation solver your own equation and let us solve it.
4r^2+21r-182=0
a = 4; b = 21; c = -182;
Δ = b2-4ac
Δ = 212-4·4·(-182)
Δ = 3353
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{-(21)-\sqrt{3353}}{2*4}=\frac{-21-\sqrt{3353}}{8} $$r_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(21)+\sqrt{3353}}{2*4}=\frac{-21+\sqrt{3353}}{8} $
| X+3x+4x=21 | | -4x^2-16-12=0 | | -4x-16x-12=0 | | 0.91x+0.13=3.500 | | 18+×=y | | 0.5x+10=2.5x-4 | | 7x9×2=5x-6 | | 7r=988 | | 3x+7x=5(x+12) | | 5=-7(x+2)-5x | | x2+1=3x+11 | | 5x=-7(x+2)-5x | | 2x=2(3)= | | 3x+32=123 | | 0.04p+0.09(1600-p)=65 | | 5(x+2)-3x=x+1 | | 4-(900/x^2)=0 | | 4-900/x^2=0 | | 6x–5=3x–29 | | 5(5x+10)+3=3x+4 | | -0.025=q^-1.5 | | 2x^-2=16 | | ×/8+x/9=17/72 | | 50x-100=40x | | 7(y-3)-2=-4(-6y+2)-7y | | X+2x+4x=15 | | 1/3x+2=1/9 | | -(8/3)=-(4/7)y-(7/2) | | -r+6=2r | | -8/3=-4/7y-7/2 | | 8x-(4x+6)=2x-34 | | 7-6m-7m=7-6-6m |