-3(b-8)-5=9(b2)+1

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Solution for -3(b-8)-5=9(b2)+1 equation:



-3(b-8)-5=9(b2)+1
We move all terms to the left:
-3(b-8)-5-(9(b2)+1)=0
We add all the numbers together, and all the variables
-(+9b^2+1)-3(b-8)-5=0
We multiply parentheses
-(+9b^2+1)-3b+24-5=0
We get rid of parentheses
-9b^2-3b-1+24-5=0
We add all the numbers together, and all the variables
-9b^2-3b+18=0
a = -9; b = -3; c = +18;
Δ = b2-4ac
Δ = -32-4·(-9)·18
Δ = 657
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$b_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$b_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:
$\sqrt{\Delta}=\sqrt{657}=\sqrt{9*73}=\sqrt{9}*\sqrt{73}=3\sqrt{73}$
$b_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-3)-3\sqrt{73}}{2*-9}=\frac{3-3\sqrt{73}}{-18} $
$b_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-3)+3\sqrt{73}}{2*-9}=\frac{3+3\sqrt{73}}{-18} $

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