(x-2)(2x-3)=9x-2

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Solution for (x-2)(2x-3)=9x-2 equation:



(x-2)(2x-3)=9x-2
We move all terms to the left:
(x-2)(2x-3)-(9x-2)=0
We get rid of parentheses
(x-2)(2x-3)-9x+2=0
We multiply parentheses ..
(+2x^2-3x-4x+6)-9x+2=0
We get rid of parentheses
2x^2-3x-4x-9x+6+2=0
We add all the numbers together, and all the variables
2x^2-16x+8=0
a = 2; b = -16; c = +8;
Δ = b2-4ac
Δ = -162-4·2·8
Δ = 192
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:
$\sqrt{\Delta}=\sqrt{192}=\sqrt{64*3}=\sqrt{64}*\sqrt{3}=8\sqrt{3}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-16)-8\sqrt{3}}{2*2}=\frac{16-8\sqrt{3}}{4} $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-16)+8\sqrt{3}}{2*2}=\frac{16+8\sqrt{3}}{4} $

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