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(0.42x)^2*x^2=3/2
We move all terms to the left:
(0.42x)^2*x^2-(3/2)=0
We add all the numbers together, and all the variables
(+0.42x)^2*x^2-(+3/2)=0
We get rid of parentheses
(+0.42x)^2*x^2-3/2=0
We multiply all the terms by the denominator
((+0.42x)^2*x^2)*2-3=0
We move all terms containing x to the left, all other terms to the right
((+0.42x)^2*x^2)*2=3
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