Question

Ex.1
Sa se calculeze:
a)√2+√3•√2+√2+√3•√2-√2+√3
b)√3-2√2+2-√2
c)√20+2√19+√29-2√19
d)√11-4√6+√21+6√6
e)(√5+2√6+√5-2√6)•√3/2

Answer 1

a)√2+√3•√2+√2+√3•√2-√2+√3=√2+√6+√2+√6-√2+√3
                                               =√2+2√6+√3
b)√3-2√2+2-√2=√3-√2+2
c)√20+2√19+√29-2√19=2√5+3√3
d)√11-4√6+√21+6√6=√11+2√6+√21
e)(√5+2√6+√5-2√6)•√3/2=2√5*√3/2=2√10/2=√10