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(9+w)(3w-1)=0
We add all the numbers together, and all the variables
(w+9)(3w-1)=0
We multiply parentheses ..
(+3w^2-1w+27w-9)=0
We get rid of parentheses
3w^2-1w+27w-9=0
We add all the numbers together, and all the variables
3w^2+26w-9=0
a = 3; b = 26; c = -9;
Δ = b2-4ac
Δ = 262-4·3·(-9)
Δ = 784
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{784}=28$$w_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(26)-28}{2*3}=\frac{-54}{6} =-9 $$w_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(26)+28}{2*3}=\frac{2}{6} =1/3 $
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