1. Reduceti termenii asemenea:


a) 4a-9a;

b) 6a+4a-12a

c) 5x+11x-12x+7x

d) 7b-3b

e) 14z-16z+2z

f) 24z-13z-7z+9z


2.


a) 4a+5a-9a+14a

b) 15x-4x+(8x-5x)-10x

c) (17y+13y-6y)-(32y-23y)

d) -8a+6a-5a+(10a-3a+5a)-4a

Răspuns:

Explicație pas cu pas:

a)  4 a - 9 a = - 5 a  

b)  6 a + 4 a - 12 a  = 10 a - 12 a = - 2 a

c)   5 x + 11 x - 12 x + 7 x = 16 x - 5 x = 11 x  

d)   7 b - 3 b = 4 b  

e)   14 z - 16 z + 2 z = - 2 z + 2 z = 0  

f)    24 z - 13 z - 7 z + 9 z = 11 z + 2 z = 13 z  

2.

a)  4 a + 5 a - 9 a + 14 a = 9 a - 9 a + 14 a = 14 a  

b)   15 x - 4 x + ( 8 x - 5 x ) - 10 x =

= 11 x + 3 x - 10 x =

= 14 x - 10 x =

= 4 x  

c)  ( 17 y + 13 y - 6 y ) - (32 y - 23 y) =

=  24 y - 9 y =

= 15 y

d)  - 8 a + 6 a - 5 a + ( 10 a - 3 a + 5 a ) - 4 a =

= - 7 a + 12 a - 4 a =

= 5 a - 4 a =

= a