Question 177548
The multiplicity of the roots is equal to the exponent of the factor. 
12.{{{y=(x-1)^2*(2x-3)^3}}} 
2 roots
{{{x-1=0}}}
{{{x=1}}}
3 roots 
{{{2x-3=0}}}
{{{2x=3}}}
{{{x=3/2}}}
Double root at x=1 (exponent 2), triple root at x=3/2 (exponent 3).
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13. {{{y = (3x-2)^5(x+4)^2}}}
5 roots
{{{3x-2=0}}}
{{{3x=2}}}
{{{x=2/3}}}
2 roots
{{{x+4=0}}}
{{{x=-4}}}
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14. {{{y = 4x^2(x + 2)^3(x + 1)}}}
2 roots 
{{{x=0}}}
3 roots 
{{{x+2=0}}}
{{{x=-2}}}
1 root 
{{{x+1=0}}}
{{{x=-1}}}