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0=2*1.39^2+3x-8
We move all terms to the left:
0-(2*1.39^2+3x-8)=0
We add all the numbers together, and all the variables
-(2*1.39^2+3x-8)=0
We get rid of parentheses
-3x+8-2*1.39^2=0
We add all the numbers together, and all the variables
-3x+4.1358=0
We move all terms containing x to the left, all other terms to the right
-3x=-4.1358
x=-4.1358/-3
x=1+1/2.6413100898045
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