20
The real square roots of 400 are 20 and -20. This is because when you square both of these numbers, you get 400. In general, every positive real number has two square roots: one positive and one negative.
20 is one of the two square roots of 400.
Prime numbers can't have whole number square roots, of course, but the largest prime number under 400 is 397.
-15 15
A number multiplied by itself is the square of that number. The reverse procedure is the square root. You can get help for square roots from you teacher, a tutor, a student who understands square roots, etc.
The real square roots of 400 are 20 and -20. This is because when you square both of these numbers, you get 400. In general, every positive real number has two square roots: one positive and one negative.
The two square roots of 400 are: 20 and -20.
20. * * * * * Sort of. ± 20 are the square roots (not rout!) of 400.
20 and -20
20 is one of the two square roots of 400.
Prime numbers can't have whole number square roots, of course, but the largest prime number under 400 is 397.
-15 15
They are -20 and +20.
Nine :) * * * * * Sort of. ± 9 are the square roots (not rout!) of 400.
A number multiplied by itself is the square of that number. The reverse procedure is the square root. You can get help for square roots from you teacher, a tutor, a student who understands square roots, etc.
300
-20 20