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x(x+3.5)(4.8-x)=0
We add all the numbers together, and all the variables
x(x+3.5)(-1x+4.8)=0
We multiply parentheses ..
x(-1x^2+4.8x-3.5x+16.8)=0
We multiply parentheses
-1x^3+4x^2-3x^2+16.8x=0
We do not support expression: x^3
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