Answer:
The expression √87x can be simplified further if x is a perfect square, because we can then rewrite the expression as the product of two factors, one of which is a perfect square. Here's how:
√87x = √(x * 87) = √(x * 3 * 29)
If x is a perfect square, say x = a^2, then we can rewrite the expression as:
√(a^2 * 3 * 29) = a√(3 * 29)
In this form, the expression is simplified further, because a is a constant and √(3 * 29) is a simplified radical.
Therefore, to simplify the expression √87x further, we need x to be a perfect square.