Multiply(3m³ - ½y) (3m³ - ½y)

wrong again.

(3m³ - ½y) (3m³ - ½y) = 9m^6 - 3m³y + ¼y²

Apologies for the mistake in my previous response. You are correct.

The correct multiplication of (3m³ - ½y) (3m³ - ½y) is indeed:

(3m³ - ½y) (3m³ - ½y) = 9m^6 - 3m³y + ¼y²

To multiply the expression (3m³ - ½y) (3m³ - ½y), we can use the distributive property and the rule for multiplying binomials.

First, let's multiply the first terms of each binomial:

(3m³) * (3m³) = 9m^6

Next, let's multiply the outer terms:

(3m³) * (-½y) = -(3/2)m³y

Now, let's multiply the inner terms:

(-½y) * (3m³) = -(3/2)m³y

Finally, let's multiply the last terms:

(-½y) * (-½y) = ¼y²

Putting all of this together, we have:

(3m³ - ½y) (3m³ - ½y) = 9m^6 - (3/2)m³y - (3/2)m³y + ¼y²

Simplifying this expression, we get:

9m^6 - 3m³y - 3m³y + ¼y²

Combining like terms, we have:

9m^6 - 6m³y + ¼y²

Therefore, the final result is 9m^6 - 6m³y + ¼y².