Answer:
we have that√(87*x)we know that87 is equal to------> 3*29In order for the square root to go further, the number for "x" has to have a factor of 3 or 29the number 21-------> 3*7so√(87*x)------> √(3*29*3*7)------> √(3²*29*7)----> 3√203the answer isx=21
Step-by-step explanation:
