Basic misunderstanding when adding two radical expressions together

The video tutorial explains the concept of square roots, focusing on the correct method to add them. It highlights common mistakes students make, such as incorrectly adding square roots by combining them under a single radical. The correct approach is demonstrated using variables, showing that adding identical square roots results in a multiplication of the root by two. The tutorial concludes with a verification of this method using examples, reinforcing the correct understanding of square root addition.

What is the square root of 9?

• 3

• 5

• 2

• 4

If sqrt(9) + sqrt(9) is not equal to sqrt(18), what is the correct way to express it?

• 3 * sqrt(3)

• sqrt(81)

• 2 * sqrt(9)

• sqrt(18)

What is the result of 6 multiplied by 6?

• 36

• 18

• 12

• 24

How do you express X + X in algebraic terms?

• X^2

• 2X

• X/2

• X+2

What is the result of 2 times the square root of 9?

• 3

• 6

• 9

• 12