14(1+√31)+(7-√31)^2=14 +14√31 +49 -14√31 +31 = 94
(√43-5)^2+10(√43-0,2)= 43 -10√43 +25 +10√43 -2 = 66
(11-√17)(11+√17)=121 - 17 = 104
(√2-√15)^2+(√6+√5)^2=2 - 2√30 +15 +6 +2√30 +5 = 28
№336.
2√3(√12+3√5)-√5(6√3-√20)= 2√36 + 6√15 -6√15 +√100= 12 +10 = 22
√6(0,5√24-8√11)-4√11(√99-2√6)=0,5√144 -8√ 66 -4√(99*11) +4√66=
=6 -132 = -126
(√162-10√5)√2 + (5+√10)^2=√324 - 10√10 +25 +10√10 +10=
=18 +25 +10 = 53
(17-√21)^2 - 5√3(4√27-6,8√7)=289 -34√21 +21 - 20√81 + 34√21=
=289 +21 -180 = 130