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(21y/9)^2+y^2=35^2
We move all terms to the left:
(21y/9)^2+y^2-(35^2)=0
We add all the numbers together, and all the variables
y^2+(+21y/9)^2-35^2=0
We add all the numbers together, and all the variables
y^2+(+21y/9)^2-1225=0
We multiply all the terms by the denominator
y^2*9)^2+(+21y-1225*9)^2=0
We add all the numbers together, and all the variables
y^2*9)^2+(21y-11025)^2=0
We add all the numbers together, and all the variables
y^2*9)^2+(21y=0
Wy multiply elements
9y^3=0
We do not support eypression: y^3
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