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(1.8-2x)(1.4-2x)*x=0
We add all the numbers together, and all the variables
(-2x+1.8)(-2x+1.4)*x=0
We multiply parentheses ..
(+4x^2-2.8x-3.6x+2.52)*x=0
We multiply parentheses
4x^3-2x^2-3x^2+2.52x=0
We do not support expression: x^3
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