Question

3. Calculaţi: a) 2³ + 6%; d) 14²-102²-8²; 2) 59 +5¹ +5²; 4. Efectuaţi: b) 5²-3²; e) 25-2³ +9%; h) 4³-3³ +5%; c) 2³ + 24 +2¹; 1) 7³-14²-7¹; 1) 2³ +5³ +2.3. 102 Dau coroana Rapiddd
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Answer 1

Explicație pas cu pas:

2³ + 6% =

= 8 + 6/100

= 403/50

14² - 102² - 8² =

= ( 7 × 2 )² - ( 51 × 2 )² - 2⁶

= 7² × 2² - 51² × 2² - 2⁶

= ( 7² - 51² - 2⁴ ) × 2²

= ( ( 7 - 51 ) × ( 7 + 51 ) - 16 ) × 4

= ( - 48 × 58 - 16 ) × 4

= ( - 2552 - 16 ) × 4

= - 10272

59 + 5¹ + 5²

= 59 + 5 + 25

= 89

5² - 3²

= 25 - 9

= 16

25 - 2³ + 9%

= 25 - 8 + 9/100

= 17 + 9/100

= 1709/100

4³ - 3³ + 5%

= 64 - 27 + 5/100

= 37 + 5/100

= 741/20

2³ + 24 + 2¹

= 8 + 24 + 2

= 34

7³ - 14² - 7¹

= 343 - 196 - 7

= 140