Question

Ajutatima va rog ! Dau coroana!
2 exerciti

Answer 1

a)

(4√2 + 3√5 - 7√2)(√72 - 5√20 - 2√2)=

(4√2 + 3√5 - 7√2)(6√2 - 10√5 - 2√2)=

(48 - 40√10 - 16 + 3√10 - 30·5 - 6√10 - 84 + 70√10 + 28=

48 + 28√10 - 16  - 150 - 84 + 28=

= 28√10 - 174

b) 3√12=6√3

√45=3√5

6√3/(3√5-4√2)+5√(2×4×18)=

=6√3/(3√5-4√2) +5√144

=6√3/(3√5-4√2) +5×12

=6√3/(3√5-4√2) +60

=[6√3+60(3√5-4√3)]/(3√5-4√2)

=(6√3+180√5-240√3)/(3√5-4√2)

=(180√5-234√3)/(3√5-4√2)

Answer 2

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