What is the sum sqaure root-2 and sqaure root - 18

The correct answer is that 4√ - 2 is the simplest radical form of this mathematical expression and 8i (i = imaginary unit) is the solution if we want to find out the square root of a negative signed number.

Step-by-step explanation:

1. Let's write in a mathematical expression the information given:

Sum square root of - 2 and the square root of - 18

√ - 2 + √ - 18

√ - 2 + √ 9. - 2 (9 * - 2 = - 18)

√ - 2 + 3 √ - 2 (√ 9 = 3)

4 √ - 2

This is the simplest radical form of this mathematical expression. If we want a concrete number, we should remember that if we refer to the imaginary numbers we can find the solution for √-2 = 2i, or for any other negative number, where i is the imaginary unit. This unit can be used for the development of the square root of negative signed numbers.

Then,

4 √ - 2 = 4 (2i) = 8i

The correct answer is that 4√ - 2 is the simplest radical form of this mathematical expression and 8i (i = imaginary unit) is the solution if we want to find out the square root of a negative signed number.