Question

Simplify the following: (I)√45-3√20+4√5 (II) (√5+√2)² (III) (√3-√2)²​

Answer 1

I hope this will help you

Answer 2

Step-by-step explanation:

1) √45-3√20+4√5

√(9*5)-3√(5*4)+4√5

3√5-6√5+4√5

7√5-6√5

=√5

2)(√5+√2)^2

(√5)^2+2√5*√2+(√2)^2

=5+2√10+2

=7+2√10

3) (√3-√2)^2

(√3)^2-2√3*√2+(√2)^2

3-2√6+2

=5-2√6