(5+x)(x-2)+10=0

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Solution for (5+x)(x-2)+10=0 equation:



(5+x)(x-2)+10=0
We add all the numbers together, and all the variables
(x+5)(x-2)+10=0
We multiply parentheses ..
(+x^2-2x+5x-10)+10=0
We get rid of parentheses
x^2-2x+5x-10+10=0
We add all the numbers together, and all the variables
x^2+3x=0
a = 1; b = 3; c = 0;
Δ = b2-4ac
Δ = 32-4·1·0
Δ = 9
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{9}=3$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(3)-3}{2*1}=\frac{-6}{2} =-3 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(3)+3}{2*1}=\frac{0}{2} =0 $

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