Question

Să se calculeze:
a) 2√2·√5-3√5·√2+4√5·3√2-5√5·4√2
b) √3·3√2-5√6·4+4√3·2√2-4√2·3√3
c) √21:√7-5√15:√5+2·3√3-4√30:√10
d) 2√35:√5-4√21:2√3-5·2√7+6√42:√6
e) √3(2√2-√5)-√2(3√3+2√5)+√5(2√2+√3)

Answer 1

a) 2√10-3√10+12√10-20√10 = -9√10
b) 3√6-20√6+8√6-12√6 = -21√6
c) √3-5√3+6√3-4√3 = -2√3
d) 2√7-2√63-10√7+6√7 = 2√7-6√7-10√7+6√7 = -8√7
e) 2√6-√15-3√6-2√10+2√10+√15 = -√6