(5x+3)(2x=6)

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Solution for (5x+3)(2x=6) equation:



(5x+3)(2x=6)
We move all terms to the left:
(5x+3)(2x-(6))=0
We multiply parentheses ..
(+10x^2-30x+6x-18)=0
We get rid of parentheses
10x^2-30x+6x-18=0
We add all the numbers together, and all the variables
10x^2-24x-18=0
a = 10; b = -24; c = -18;
Δ = b2-4ac
Δ = -242-4·10·(-18)
Δ = 1296
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{1296}=36$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-24)-36}{2*10}=\frac{-12}{20} =-3/5 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-24)+36}{2*10}=\frac{60}{20} =3 $

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