Question

2(根号3-根号2)^2 (2)根号（-5）^2-绝对值2-根号5绝对值-3根号18

Answer 1

2(√3-√2)²

=2(3-2√6+2)

=10-4√6

原式=|-5|-(√5-2)-3*3√2

=5-√5+2-9√2

=7-√5-9√2