Question

What is √45 in simplest radical form?

Answer 1

=3√5

Explanation:

Simplifying this expression involves prime factorisation of

45

45 = 3⋅3⋅5

(3 and 5 are the prime factors of 45)

So √45

=√3⋅3⋅5

=√32⋅5

=3⋅√5

=3√5