Question

Which statement is true about the difference 2 square root of 7 − square root of 28? It is rational and equal to −2. It is rational and equal to 0. It is irrational and equal to −2square root of 7. It is irrational and equal tosquare root of 7.

Answer 1

`2√(7) - √(28) = 2 √(7) - √(4 * 7 ) =2 √(7) - 2 √(7 ) = 0`