If it's not what You are looking for type in the equation solver your own equation and let us solve it.
21b+63b^2=0
a = 63; b = 21; c = 0;
Δ = b2-4ac
Δ = 212-4·63·0
Δ = 441
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{441}=21$$b_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(21)-21}{2*63}=\frac{-42}{126} =-1/3 $$b_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(21)+21}{2*63}=\frac{0}{126} =0 $
| 9w+9/4=7w+8/8+15 | | -3x+4÷2=1/3 | | 10y+y^2=200 | | 7/3b-1=5 | | 24m+2=46m-4 | | 2x-3=(x-5)/4 | | √33y-√5y=0 | | 2*x-4=3*x+7 | | 6^(x-2)=11.18 | | 1/2*3x+x=120 | | 3b+2=20-3b | | 10x=96−2x | | 4x−11=5 | | 2x−4=14 | | 1/9x-(5x-1)=7/6x-(2x-1) | | x(3x+1)=80 | | 2x−7=3 | | 30(3/100)+20y=2 | | 9x−20=52 | | 2x−12=8 | | 900+20y=2 | | 5x+3-3x=3x+2-3x | | 4x+5=-11x-55 | | 7x+9=27+5x | | 6x+7=37+3x | | 5m+7=27m= | | (2x)^2/(0,200-x)^2=8,32 | | n=7140n | | 5(p-1)=2 | | x-7/x-2=5/4 | | 4x^2/2-x=1,32 | | 6x=8=62 |