If it's not what You are looking for type in the equation solver your own equation and let us solve it.
12.56r^2=91.4
We move all terms to the left:
12.56r^2-(91.4)=0
We add all the numbers together, and all the variables
12.56r^2-91.4=0
a = 12.56; b = 0; c = -91.4;
Δ = b2-4ac
Δ = 02-4·12.56·(-91.4)
Δ = 4591.936
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{-(0)-\sqrt{4591.936}}{2*12.56}=\frac{0-\sqrt{4591.936}}{25.12} =-\frac{\sqrt{}}{25.12} $$r_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+\sqrt{4591.936}}{2*12.56}=\frac{0+\sqrt{4591.936}}{25.12} =\frac{\sqrt{}}{25.12} $
| y-2=3y+1 | | 15x+20=2x-14 | | -8x-9=21 | | 2e+17/3=9 | | x–1.1=1.3x | | 5x^2-40x+50=0 | | -15+m+2-4=3m-7 | | 96=-16n | | m/5-11=4 | | x–1.1=1+0.3x | | 1.8=c/5-2.3 | | 42=2d | | 7/8(-3y+1)=-2y-1 | | 49t-41=9t-6 | | 5=t÷4 | | 2w^2-9w+3=-4w | | X4+y=180 | | 4=r+5/8 | | -4×-9y=-23 | | 5g/6+2/3=29/6 | | -6+7(1-2m)=3(2m+7) | | x=1.6+0.2x | | x+2/2=2-x+2/7 | | 2(2x+4)-5(x-3)=-12 | | X+y(15)=-67 | | 11/3+3n=(4/5)n+15 | | 4x/14−5/7=37 | | -15t^2+600t+50=0 | | -8(c+5)=32 | | -1=3s+-7 | | 0.4x–0.4=1.6+0.2x | | 3(x-7)-6=-4(-6x+3)-9x |