32=(4+w)*w

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Solution for 32=(4+w)*w equation:



32=(4+w)*w
We move all terms to the left:
32-((4+w)*w)=0
We add all the numbers together, and all the variables
-((w+4)*w)+32=0
We calculate terms in parentheses: -((w+4)*w), so:
(w+4)*w
We multiply parentheses
w^2+4w
Back to the equation:
-(w^2+4w)
We get rid of parentheses
-w^2-4w+32=0
We add all the numbers together, and all the variables
-1w^2-4w+32=0
a = -1; b = -4; c = +32;
Δ = b2-4ac
Δ = -42-4·(-1)·32
Δ = 144
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$w_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$w_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{144}=12$
$w_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-4)-12}{2*-1}=\frac{-8}{-2} =+4 $
$w_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-4)+12}{2*-1}=\frac{16}{-2} =-8 $

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