Question

Ajutati-ma la 14 va rog mult ofer coroana..Daca nu se intelege acolo este la puterea 3-a..
Va rog mult♥♥♥♥3

Answer 1

Formule:

(a+b)^3= a^3+3a^2b+3ab^2+b^3
(a-b)^3=a^3-3a^2b+3ab^2-b^3

a) (2-√3)^3= 8-3•4•√3+3•2•3-3√3=
8-12√3+18-3√3=-8-15√3

b) (√2-√3)^3=2√2-3•2•√3+3•√2•3-3√3=
2√2-6√3+9√2-3√3=11√2-9√3

c) (3√5+1)^3=27•5√5+3•45•1+3•3√5•1+1=
135√5+135+9√5+1=144√5+136

d) (2+√3)^3=8+3•4•√3+3•2•3+3√3=
8+12√3+18+3√3= 26+15√3

Bafta la scoala!