2x*9x=91

Simple and best practice solution for 2x*9x=91 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for 2x*9x=91 equation:



2x*9x=91
We move all terms to the left:
2x*9x-(91)=0
Wy multiply elements
18x^2-91=0
a = 18; b = 0; c = -91;
Δ = b2-4ac
Δ = 02-4·18·(-91)
Δ = 6552
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:
$\sqrt{\Delta}=\sqrt{6552}=\sqrt{36*182}=\sqrt{36}*\sqrt{182}=6\sqrt{182}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-6\sqrt{182}}{2*18}=\frac{0-6\sqrt{182}}{36} =-\frac{6\sqrt{182}}{36} =-\frac{\sqrt{182}}{6} $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+6\sqrt{182}}{2*18}=\frac{0+6\sqrt{182}}{36} =\frac{6\sqrt{182}}{36} =\frac{\sqrt{182}}{6} $

See similar equations:

| 48000+100x=51250-150x | | 3y2+2y=0 | | 5x+74=9x+10 | | 7-3x+3=4x-12 | | h/4+7=7 | | 7x+5-2x=2 | | 4s-1=11 | | 199=4x-1 | | 5x+4-5x-20=0 | | 3.2x-13.58=6.9 | | d/2-8=8 | | 0=2x^2-2x-5 | | 4x+7+6=9x+3 | | 2x-1=149 | | 15d-3=12 | | 7m+0=7 | | 12x/3=20 | | 5+d/5=8 | | 4h+4=8 | | 6+9x+3=4x+7/2 | | 5x+74=180/3 | | 5x+74=45*3 | | 6+9x+3=4x+7 | | 5x+74=90 | | 6+9x+3=4x-7 | | 5x+74=18045 | | 5x+74=45 | | 4(x+3)=-7 | | -2x-4+8=20 | | 196x=-189 | | 3x+67+10x-29=90 | | 7x+8+14x-2=90 |

Equations solver categories