If it's not what You are looking for type in the equation solver your own equation and let us solve it.
8x^2+7=655
We move all terms to the left:
8x^2+7-(655)=0
We add all the numbers together, and all the variables
8x^2-648=0
a = 8; b = 0; c = -648;
Δ = b2-4ac
Δ = 02-4·8·(-648)
Δ = 20736
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{20736}=144$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-144}{2*8}=\frac{-144}{16} =-9 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+144}{2*8}=\frac{144}{16} =9 $
| 4.50(500)=x | | 5.4g+10=3.4g+20 | | y+35=180 | | +h=1-2h | | 2x(x+4)=56 | | 42=6x+2 | | 100+(x-25)+1/2x+(x-15)+1/2x=540 | | 16r-8+4r=2(10r-4) | | 17=-x/3+12 | | x/72=8 | | 3.2g+2=1.2g+12 | | 13+s/6=21 | | 9x−4=9(x−1)+18 | | -9.4g=-2.37-9.7g | | 3(r+3)=3r+11 | | x-7=8+5 | | 5x-10=-145 | | 1/2=-5(7/2)+b | | 9+4+z=3 | | 3n-3=-11+n | | ((5/2)x)+((1/2)x)=17+(1/2)+((7/2)x) | | x-0.1x=264,000 | | -20=4(w-4)-8w | | 2x-3(.6)=7 | | b-(8+11)=23 | | -19m+7=-18m | | 3x2/3x=4 | | 17(2)-3y=7 | | 5x+1=111 | | -26.6-6.4x=-146.3+6.9x | | x/25-83=-86 | | 3+11=3+x |