Which of the following statements about squares and square roots is FALSE?
The square root of 25 could be 5 or -5
Squaring a number is the opposite of taking the square root
3^2 could be 9 or -9
The positive square root is known as the principle square root
3^2 could be 9 or -9
Three students tried each problem.
Select the student that is incorrect.
#2 Nikki: ∛1 is 1.
I know this because 1 x 1 x 1 is 1.
#3 Carmen: ∛125 is 25.
I know this because 25 x 3 is 125.
#1 Brandon: ∛27 is 3.
I know this because 3^3 is 27.
Student #3 Carmen is incorrect.
The cube root of 125 is 5, not 25. This is because 5 x 5 x 5 = 125.