If it's not what You are looking for type in the equation solver your own equation and let us solve it.
0.23x^2+4x+9=15
We move all terms to the left:
0.23x^2+4x+9-(15)=0
We add all the numbers together, and all the variables
0.23x^2+4x-6=0
a = 0.23; b = 4; c = -6;
Δ = b2-4ac
Δ = 42-4·0.23·(-6)
Δ = 21.52
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{-(4)-\sqrt{21.52}}{2*0.23}=\frac{-4-\sqrt{21.52}}{0.46} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(4)+\sqrt{21.52}}{2*0.23}=\frac{-4+\sqrt{21.52}}{0.46} $
| 8+6x=2/3x+56/3 | | 13x-5=81 | | 21/2l+2=24 | | 81=13x-5 | | u-5.74=4.71 | | 3(x-1)-2(x-3)=-3 | | -4=u+2/3 | | v+52=v+26 | | -31/2/11/4=e | | x+1-6x=-4 | | (4x+1)/3=11,x= | | (30y+120)÷5-6y=16 | | 9+(x-3)+(x+5)=180 | | 1+7x+4K=45 | | Y=4/5x+22 | | 12-6(x-5)=42 | | s+3=s+59 | | 13-5(x+1)=48 | | 9+x+5+x-3=180 | | 7-2(x-4)=17 | | H=x/5-6 | | 30x^2-21x+10=0 | | 8-9(x+1)=17 | | 2b=b+93=6b-52 | | 11x+5=14x-7 | | 30x^2-21x+7=0 | | -5+3(x+9)=1 | | 3t=4t-42 | | -5+(x+9)=1 | | -1/2+y=3/5 | | 3x-3x/5=x+(4x-2) | | 3/8=w+6 |