7 √5 - 4 √5

Answer 1

To simplify the expression 7√5 - 4√5, we can combine the like terms.

The terms 7√5 and -4√5 both have the same ratical part (√5), so we can combine them as follows:

(7 - 4)√5

Simplifying further:

3√5

Thus, 7√5 - 4√5 simplifies to 3√5.