21.
2
The square root of 60 lies between 7 and 8 because 7 squared is 49 and 8 squared is 64 and 60 is in between 49 and 64.
-7.. square root cancels out square
Huh? The square root of 49 is 7. 4 squared is 16 Take it from there
Since squaring root 2 gives 2, you can simplify 7 sqrt(2)2 as 7 x 2 = 14.
21.
The expression cannot be simplified.
The square root of 28 minus the squared root of 7 =±2.64575131
7
the 4th root of 49 is the square root of the square root of 49 since square root 49 =7 then simplify is square root of 7
7
2
7 times the square root of 7
Sqrt (63)sqrt (9 * 7)sqrt (9) * sqrt (7)3 sqrt(7)
4 times the square root of 7
Distance: square root of [(4-7)squared+(6--3)squared)] = 3 times sq rt of 10 which is about 9.487 rounded