Question 69235
[(x^2+x-6)/2x] * [(2x^2-4x)/(x^2+7x+12)]

Factor where possible, as follows:

= [(x+3)(x-2)/2x] * [2x(x-2)/(x+4)(x+3)]

Cancel the common factors of 2x and x+3:

=(x-2)^2/(x+4)

Cheers,
Stan H.