If it's not what You are looking for type in the equation solver your own equation and let us solve it.
21x+9x^2+10=0
a = 9; b = 21; c = +10;
Δ = b2-4ac
Δ = 212-4·9·10
Δ = 81
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{81}=9$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(21)-9}{2*9}=\frac{-30}{18} =-1+2/3 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(21)+9}{2*9}=\frac{-12}{18} =-2/3 $
| -4k+2(5k-6=-3k=-39 | | 3y=11/2y-10 | | 30/100=28/x | | 7w+2(w+6)=3 | | y+1/5=2/7 | | 85x+3=(164)−23 | | 11=4y+7 | | 12=-3+3u | | -40=-4(u+7) | | 14=9x-2x | | x(5)+12=-9 | | 2(b+2)-(5+b=-7 | | 18249+678+x=167893 | | x+2.3=9.10 | | 10x-3.5=4.2 | | x5+12=-9 | | 3/(x-5)=-7/(x+5) | | x=14=39 | | 12+x5=-9 | | -4|x-2|+1=25 | | 3*2+6(8+2)=x | | 4w=2w+18 | | n+45=12 | | 4=20x-25x2 | | X-5/3+5/3=x/2 | | 3x(x+44)=180 | | -7-(5/3)y=8 | | (5)x+5=90 | | 2(4z+4)-3(5z+5)=35 | | -5u+6=15 | | 0=-2x+14000 | | X=(2y-10)/425 |