The first step to solving this is to factor out the first perfect square now factor out the second perfect square then factor out the second perfect square the root of a product is equal to the product of the roots of each factor reduce the index of the radical and exponent with 2 of the first square root 12 reduce the index of the radical and exponent with 2 of the second square root 12x³ reduce the index of the radical and exponent with 2 of the third square root 12x³y² this means that the correct answer to your question is 12x³y² . let me know if you have any further questions :)