Question

repede va rog mult dau coroana 1-10

Answer 1

Răspuns

Explicație pas cu pas:

1)   ( x + 3 ) - ( x + 3 ) = x + 3 - x - 3 = ( x - x ) + ( 3 - 3 ) = 0 + 0 = 0

2)  ( 4 x + 6 ) - ( 4 x - 6 ) = 4 x + 6 - 4 x + 6 = 12

3)  - ( 3 x + 1 ) + ( 3 x - 1 ) = - 3 x - 1 + 3 x - 1 = 0 - 2 = - 2

4)   - ( 7 x - 3 ) + ( 3 - 7 x ) = - 7 x + 3 + 3 - 7 x = - 14 x + 6

5)    - ( x² + 5 x - 1 ) + ( x² - 5 x + 1 ) =

=  - x² - 5 x + 1 + x² - 5 x + 1 =

= - 10 x + 2

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6)  x² - ( x² + 5 x - 1 ) + 5 x = x² - x² - 5 x + 1 + 5 x = 1

7)  - ( x - 1 ) - ( 1 - x ) = - x + 1 - 1 + x = 0

8)   x + x - x² - ( x + 2 x - 3 x² ) = 2 x - x² - 3 x + 3 x² = 2 x² - x

9)  3 ( x² + 2 x - 3 ) - ( 3 x² + 6 x - 9 ) = 0

= 3 x² + 6 x - 9 - 3 x² - 6 x + 9 =

= 0

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10)   7 x - ( 3 x - 4 x ) + ( x - 1 x ) = 7 x + x + 0 = 8 x