If it's not what You are looking for type in the equation solver your own equation and let us solve it.
10x^2+3x-21=0
a = 10; b = 3; c = -21;
Δ = b2-4ac
Δ = 32-4·10·(-21)
Δ = 849
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(3)-\sqrt{849}}{2*10}=\frac{-3-\sqrt{849}}{20} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(3)+\sqrt{849}}{2*10}=\frac{-3+\sqrt{849}}{20} $
| X+x+x=12-3 | | w÷4=7 | | 8z+5-6z=45-6z | | 10/2=x/20 | | -(-x+2)=10 | | 11/2(n+41/2)=12 | | 8(3+6x)-1=-26-x | | (y-84)/(2)=5 | | 8+w=26 | | 20-(3x+9)-2=-(-11x+1) | | 13x+57+11x+63=180 | | 6x^2-20x=-3x^2-7x-4 | | 7+49x²=0 | | 6d=102 | | 2x=490 | | 24f=96 | | 5x=490 | | 5x-7x=6+6 | | x-7/4=5 | | 13-9h-15=7h-10 | | 2y+19=48 | | 8y-y=7y | | 2y+10=48 | | 2(x-7)=3x-4 | | (v/2)-3=5+(v/2) | | 2y+2=48 | | 3w+4=4w-28 | | 3(7x-1)=5(15+6x) | | -8(5-8v)=-360 | | 8x-37+9x-4=180 | | x=9-72 | | 17=3k=26 |