If it's not what You are looking for type in the equation solver your own equation and let us solve it.
3x^2+15=258
We move all terms to the left:
3x^2+15-(258)=0
We add all the numbers together, and all the variables
3x^2-243=0
a = 3; b = 0; c = -243;
Δ = b2-4ac
Δ = 02-4·3·(-243)
Δ = 2916
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{2916}=54$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-54}{2*3}=\frac{-54}{6} =-9 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+54}{2*3}=\frac{54}{6} =9 $
| 9(x-2)=-45 | | 9(x+2)=-45 | | 6x+3=3x-24 | | 5x+61=8x-8 | | 7n-35=2n-12 | | –3(s–4)=15 | | 18x-54=-8x+84 | | X=(4x-31) | | 3(n-6)+4n=-19 | | w/19+17=17 | | 97x=-1 | | x*1/6=0.5 | | 9x+16=-2x+38 | | (2x+8)=(5x+2) | | y=3^2+3 | | 4x+80+x-30=180 | | B=9/2(j-49) | | (8x+3)+(3x+2)=90 | | -5-3x=-4x+9 | | -4=2(4)+b | | -5-3x=-4x | | 9x+17=37 | | x(X+3)-270=0 | | 2(2x-3)+3x=2(x+1)+7 | | -.25x+7=2 | | d+413=3 | | 9x-3=(2x-8) | | -18=-9-3(2x-1) | | 2(4m+5)=42 | | 8x+3+3x-2=90 | | 5g+4(-5+3g)=1-g= | | -6-5=1-2x/3 |