Question

(6−3×√5)×(6+3√5)+(3×√5−2√20)×√5
Срочно

Answer 1

Ответ:

45

Объяснение:

(6-3√5)(6+3√5)(3√5 -2√20)·√5=(6²-(3√5)²)(3√5-2√(5·4))·√5=(36-9·5)·√5 ·(3-2√4)·√5=(36-45)·5(3-2·2)=-9·5(3-4)=-45·(-1)=45