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(3w+8)(2w-9=5)
We move all terms to the left:
(3w+8)(2w-9-(5))=0
We add all the numbers together, and all the variables
(3w+8)(2w-14)=0
We multiply parentheses ..
(+6w^2-42w+16w-112)=0
We get rid of parentheses
6w^2-42w+16w-112=0
We add all the numbers together, and all the variables
6w^2-26w-112=0
a = 6; b = -26; c = -112;
Δ = b2-4ac
Δ = -262-4·6·(-112)
Δ = 3364
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{3364}=58$$w_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-26)-58}{2*6}=\frac{-32}{12} =-2+2/3 $$w_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-26)+58}{2*6}=\frac{84}{12} =7 $
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