3x+2x(x-1)=10

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Solution for 3x+2x(x-1)=10 equation:



3x+2x(x-1)=10
We move all terms to the left:
3x+2x(x-1)-(10)=0
We multiply parentheses
2x^2+3x-2x-10=0
We add all the numbers together, and all the variables
2x^2+x-10=0
a = 2; b = 1; c = -10;
Δ = b2-4ac
Δ = 12-4·2·(-10)
Δ = 81
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{81}=9$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(1)-9}{2*2}=\frac{-10}{4} =-2+1/2 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(1)+9}{2*2}=\frac{8}{4} =2 $

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