6 square rot 15y^4* 2 square root 20y^2

6 square rot 15y^4* 2 square root 20y^2

= 6√(15y^2) * √(20y^2) ??
If so, then
= 6y√15 * 2y√5
= 12y^2 √75
= 60y^2 √3

6√(15y^4) * √(20y^2)

...
60√3 y^3

To simplify the expression 6√15y^4 * 2√20y^2, you need to simplify each square root separately and then multiply the simplified expressions.

Let's start by simplifying the square root of 15y^4:
√15y^4

First, express the number 15 as the product of its prime factors:
15 = 3 * 5

Next, simplify the square root of y^4:
√y^4 = y^2

Now, put both parts together:
√15y^4 = √(3 * 5) * y^2

Since the square root is a multiplicative operation, this can be further simplified as:
√15y^4 = (√3 * √5) * y^2

Next, simplify the square root of 20y^2:
√20y^2

Express 20 as the product of its prime factors:
20 = 2 * 2 * 5

Now, simplify the square root of y^2:
√y^2 = y

Combine both parts:
√20y^2 = √(2 * 2 * 5) * y

This can be further simplified as:
√20y^2 = (√2 * √2 * √5) * y

Now that we have simplified both square roots, let's multiply them:
(√3 * √5) * y^2 * (√2 * √2 * √5) * y

Multiplying the like terms within the square roots:
(√3 * √2) * (√5 * √2) * y^2 * y

Simplify the square roots:
√6 * √10 * y^2 * y

Finally, multiply the variables:
√(6 * 10) * y^(2+1)

Simplify 6 * 10:
√60 * y^3

The final simplified expression is:
√60y^3