=(2- 1/2)√3

=3√3/2

(2)|2-√5|+√5

=√5-2+√5

=2√5-2

(3)2√2-3(√3-√2)

=2√2-3√3+3√2

=5√2-3√3

(4)|√2-√3|-3/2√3

=√3-√2-3√3/2

=-√3/2 -√2