(2x+10)(x+6)=258+

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Solution for (2x+10)(x+6)=258+ equation:



(2x+10)(x+6)=258+
We move all terms to the left:
(2x+10)(x+6)-(258+)=0
We add all the numbers together, and all the variables
(2x+10)(x+6)-0=0
We add all the numbers together, and all the variables
(2x+10)(x+6)=0
We multiply parentheses ..
(+2x^2+12x+10x+60)=0
We get rid of parentheses
2x^2+12x+10x+60=0
We add all the numbers together, and all the variables
2x^2+22x+60=0
a = 2; b = 22; c = +60;
Δ = b2-4ac
Δ = 222-4·2·60
Δ = 4
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{4}=2$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(22)-2}{2*2}=\frac{-24}{4} =-6 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(22)+2}{2*2}=\frac{-20}{4} =-5 $

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