Simplify. Idenfy and x-values for which the expression is undefined.
3x^2-9x-12 / 6x^2+9x+3
/( 6x2+9x+3)= (3x2-12x+3x-12)/[ ( 6x2+6x+3x+3)]
If x not equal to -1 , this becomes 3(x-4)/(6x+3)
This is not defined for x= -1/2
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