4.6 is a better approximation to the square root of 21.
The square root of 45 is approximately 6.71, and the square root of 67 is approximately 8.19. Therefore, the square root of 45 minus the square root of 67 is approximately 6.71 - 8.19, which equals about -1.48.
3 times the square root of 5
21
The square root and square functions are inverse of one another EXCEPT that square root is not really a function: it is a 1-to-many mapping. So sqrt(square(21)) = sqrt(441) = ±21
It is 2*sqrt(5).
The square root of 21 is 4.58257569495584.
Square root of 45 times square root of 45 = 45
45 is the square root of 2,025 (45 x 45 = 2025).
The square root of 21 is 4.58257569495584.
√45 = 6.708203932499369
The square root of 45 in simplest form is 3sqrt(5). You take the 2 roots from 45 (5 and 9) and find out the square root of 9 is 3, while the square root of 5 is still just square root 5.
3 times the square root of 5
45+45+90
21
Root 64 is 8, if by root you mean the square root. Then the problem become -square root 84(6+8) which is the - square root of 84(14) But square root of 84 is 2(square root of 21) so the final answer comes from -2(square root 21)x14 which is -28square root (21)
45
21The square root of 441 is 21