21 no need to answer okay?
i21 = square root of (-441)
Take the square root of both sides. x2 = 441 So x = 21
21The square root of 441 is 21
441 square root
441 has two square roots; 21 or -21.
21
It is 21
Yes because 21 is a rational number
12
21
Yes, they are.
length x length = area length = square root of 441= 21 inches