Respuesta :

12a³d² - 6ad³ = 6ad²(2a² - d)
GCD (12,6) = 6
GCD (a³,a) = a
GCD (d²,d³) = d²

Then 12a³d² − 6ad³ = 6.a.d²(2a - d)
RELAXING NOICE
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