If it's not what You are looking for type in the equation solver your own equation and let us solve it.
7b^2-27b-4=0
a = 7; b = -27; c = -4;
Δ = b2-4ac
Δ = -272-4·7·(-4)
Δ = 841
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$b_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$b_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{841}=29$$b_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-27)-29}{2*7}=\frac{-2}{14} =-1/7 $$b_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-27)+29}{2*7}=\frac{56}{14} =4 $
| -4.9t^2+16t-42=0 | | (16x-4)•(9x-6)=180 | | 5*x=245 | | -x-3=-2x+6 | | X/2-y=32.5 | | 17k-13=4k+13k+4 | | 15r+15=16r | | 60+4y-2=90 | | l+247+85=2010 | | 7x-24=116* | | 20-14j-2=18-14j | | 7x-9+14=10x-7= | | 24-11x-1=12×+13 | | 11(x+18)−6(2x+1)=3x−4(9−x) | | 5r+2r+6=90 | | 3x-8.1;x=64 | | 5=6x^2-3x | | -18=x/3+2= | | 5q-1+4q+1=90 | | 3x+.66x=49 | | -5-3m=4 | | 9x^2−6x−11=0 | | X^3+13x^2+36=0 | | 2(7−x)−(x+1)=2+4(x−6) | | 132x+270=1201.98 | | -5(3x-4)+6x=6(x+5) | | -10+7q=4q+3q-10 | | 3x+2/3x=49 | | -11(4n-9)=-1+7(n+7) | | 5=3m+4 | | 14x+6x=32 | | 130x+270=1201.98 |