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If there is a solution `x_0` of algebraic equation
` `that is a whole number than that solution must divide `a_0` i.e. `x_0|a_0`. Also if `x_0` is such solution then polynomial ` ` `a_nx^x+a_(n-1)x^(n-1)+cdots+a_1x+a_0` can be divided by `x-x_0` without residue.
Now if you put `x_0=2` you see that it is a null point of your polynomial
Again we search for integer solution and we get `x_1=2`
Now this is a quadratic polynomial for which we can easily find null points.
`x_(2,3)=(-5 pm sqrt(25+144))/(2cdot6)=(-5 pm 13)/12`
Now that we have all null points we can use them to factor our polynomial
`(x-2)^2(x+3/2)(x-2/3)` <-- Your solution.
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