Question

Calculați:
_______________________
DAU COROANĂ!

Answer 1

Răspuns

b) 2√8 + 3√18 - 4√32 =

2 × 2√2 + 3 × 3√2 - 4 × 4√2 =

4√2 + 9√2 - 16√2 = -3√2

c) 3√6 + 4√24 - 5√54 - 2√150 =

3√6 + 4×2√6 - 5×3√6 - 2×5√6 =

3√6 + 8√6 - 15√6 - 10√6 = -14√6

d) (2√7 + 3√28 ) - ( 5√63  - 4√112 ) =

(2√7  + 3×2√7 ) - ( 5×3√7 - 4×4√7 ) =

(2√7 + 6√7 ) - ( 15√7 - 16√7 ) =

8√7 - ( -√7 ) = 8√7 + √7 = 9√7

e) √160 - 3√90 + 4√10 =

4√10 - 3×3√10 + 4√10 =

4√10 - 9√10 + 4√10 = -√10