Question

what is the exact value of the expression the square root 72. − the square root of 8. the square root of 128.? simplify if possible.

Answer 1

`√(72) = √(36 * 2) = √(36) * √(2) = 6 * √(2) = 6 √(2)`

`√(8) = √(4 * 2) = √(4) * √(2) = 2 * √(2) = 2 √(2)`

`√(128) = √(64 * 2) = √(64) * √(2) = 8 * √(2) = 8 √(2)`