Find the square root of 324(x+y)10
18 (x + y)5
18 (x + y)2
17 (x + y)2
18 (x + y)3
√324(x+y)10=√324×√(x+y)10
= 18(x+y)5
___ should be added to 9x2+18x to make it a perfect square.