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90(b+45)3/2b(2b-90)b=540
We move all terms to the left:
90(b+45)3/2b(2b-90)b-(540)=0
Domain of the equation: 2b(2b-90)b!=0We multiply all the terms by the denominator
b∈R
90(b+45)3-540*2b(2b-90)b=0
We multiply parentheses
270b-540*2b(2b-90)b+12150=0
Wy multiply elements
270b-1080b(2+12150=0
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