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1)11√5+√500-√180=11√5+√(100.5)-√(36.5)=11√5+10√5-6√5=15√5
2)3√2(5√2-√32)=3√2(5√2-√(16.2))=3√2(5√2-4√2)=
= 3√2√2=3.2=6
3)(√6+√3)²=(√6)²+2√6√3+(√3)²=6+2√18+3=9+2√(9.2)=
=9+6√2
4)(√3-√8)(√8+√3)=(√3)²-(√8)²=3-8=-5
5)(7+√7)/5√7=(7+√7)√7/5√7√7=(7√7+7)/(5.7)=7(√7+1)/(5.7)=(√7+1)/5
6)10/(3-√5)=10(3+√5)/((3-√5)(3+√5)=10(3+√5)/(9-5)=
= 10(3+√5)/4=2,5(3+√5)
7)√(12+6√3)=√(9+3+6√3)=√(9+6√3+3)=√(3²+2.3.√3+(√3)²)=
=√(3+√3)²=3+√3
(A²+2AB+B²=(A+B)²)
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Verified answer
1)11√5+√500-√180=11√5+√(100.5)-√(36.5)=11√5+10√5-6√5=15√5
2)3√2(5√2-√32)=3√2(5√2-√(16.2))=3√2(5√2-4√2)=
= 3√2√2=3.2=6
3)(√6+√3)²=(√6)²+2√6√3+(√3)²=6+2√18+3=9+2√(9.2)=
=9+6√2
4)(√3-√8)(√8+√3)=(√3)²-(√8)²=3-8=-5
5)(7+√7)/5√7=(7+√7)√7/5√7√7=(7√7+7)/(5.7)=7(√7+1)/(5.7)=(√7+1)/5
6)10/(3-√5)=10(3+√5)/((3-√5)(3+√5)=10(3+√5)/(9-5)=
= 10(3+√5)/4=2,5(3+√5)
7)√(12+6√3)=√(9+3+6√3)=√(9+6√3+3)=√(3²+2.3.√3+(√3)²)=
=√(3+√3)²=3+√3
(A²+2AB+B²=(A+B)²)