Question

Oblicz wartość wyrażeń algebraicznych .

3 x + 1 x = - 1

5 - 2 y y = 1

a ( 2 a + 1 ) a = 1

S do kwadratu - 1 S = - 3

2 ( x - y ) x = - 3 , y = 4

prosze o pomoc . ; ) dam naj !

Answer 1

3 x + 1       x = - 1

3*(-1)+1=-3+1=-2

 

5 - 2 y        y = 1

5-2*1=5-2=3

 

a ( 2 a + 1 )      a = 1

1(2*1+1)=2+1=3

 

S do kwadratu - 1      S = - 3

(-3)^2-1=9-1=8

 

2 ( x - y )        x = - 3 , y = 4

2(-3-4)=2*(-7)=-14

 

licze na naj

Answer 2

3 x + 1       x = - 1

-1 *3 +1 = -3 + 1=-2

 

5 - 2 y        y = 1

5 - 2*1 = 5 - 2 = 3

 

a ( 2 a + 1 )      a = 1

1 (2*1 + 1) = 2+1 = 3

 

  - 1      S = - 3

-1 = 9-1 = 8

 

2 ( x - y )        x = - 3 , y = 4

 2 (-3-4) = 2 * (-7) = -14