Remove all perfect squares from the square root of 42a^4b^6

Removing the perfect squares from the square root of 42a^4b^6 leaves us with only 42 as all other values present are perfect squares

Step-by-step explanation:

In this question, we are asked to remove all perfect squares from the square root of 42a^4b^6

The term perfect square refer to those values that have a whole number square root. Apart from normal numbers, any index raised to an even number is a perfect square while all index raised to an odd number is not a perfect square.

The perfect squares we have here are a^2, 4 and b^6. The square root of these are 2, a and b^3

Thus, we are left with only 42.