BŁAGAM POMÓŻCIE ! Ja nie rozumiem tego ;(
A: 2x+3y-2
B: -2x-3Y+5
C: 6x+2y+3
D: -5x-1
a) B+(C-A)
b) (A+C)-B
c) (C-A)-B
d) (A-C)+B
e) C-D+A
f) D+A-C
g) D+C-A
h) A-(C+D)
Przypominam : Daję naj ! Błagam pomóżcie !
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a) B+(C-A)
2x-3y+5 + (6x+2y+3 - (2x+3y-2)) = 2x - 3y + 5 + (6x+2y+3-2x-3y+2) =
2x-3y+5+6x+2y+3-2x-3y+2=6x-4y+10
b) (A+C)-B
( 2x+3y-2 + 6x+2y+3) - ( -2x-3Y+5) = 8x+5y+1 + 2x+3y-5=10x+8y-4
c) (C-A)-B
(6x+2y+3 - (2x+3y-2)) - ( -2x-3Y+5)= 6x+2y+3-2x-3y+2 + 2x+3y-5= 6x+2y
d) (A-C)+B
(2x+3y-2 - (6x+2y+3)) -2x-3Y+5 = 2x+3y-2-6x-2y-3-2x-3y+5=-6x-2y
e) C-D+A
6x+2y+3 - (-5x-1) + 2x+3y-2 =6x+2y+3+5x+1+2x+3y-2= 13x+ 5y -1
f) D+A-C
-5x-1 + 2x+3y-2 - (6x+2y+3)= -5x-1+2x+3y-2-6x-2y-3=-9x+y-6
g) D+C-A
-5x-1 + 6x+2y+3 - (2x+3y-2)=-5x-1+6x+2y+3-2x-3y+2=-x-y+4
h) A-(C+D)
2x+3y-2 - (6x+2y+3-5x-1)= 2x+3y-2 - (x+2y+2)=2x+3y-2-x-2y-2=x+y-4
Mam nadzieję, że nigdzie sie nie pomyliłam ;) w razie pytań, mozesz pisać ;)
a) (5-2x-3y)+{(6x+2y+3)-(2x+3y-2)}=
=5-2x-3y+6x+2y+3-2x-3y+2=
=2x+10-4y
b) {(2x+3y-2)+(6x+2y+3)}-(-2x-3y+5)=
=8x+5y+1+2x+3y-5=
=10x+8y+6
c) {(6x+2y+3)-(2x+3y-2)}-(-2x-y+5)=
=6x+2y+3-2x-3y+2+2x+y-5=
=7x
d) (2x+3y-2)-(6x+2y+3)+(-2x-3Y+5)=
=2x+3y-2-6x-2y-3-2x-3y+5=
=(-6x-2y)
e) ( 6x+2y+3)-( -5x-1)+( 2x+3y-2)=
=6x+2y+3+5x+1+2x+3y-2=
=13x+5y+2
f) (-5x-1+2x+3y-2)-( -5x-1)=
=-5x-1+2x+3y-2+5x+1=
=2x-2-3y
g) (-5x-1+6x+2y+3)-(2x+3y-2)=
=x+2+x+2y-2x-3y+2=
=4-y
h) 2x+3y-2-(6x+2y+3+(-5x-1)=
=2x+3y-2-6x-2y-3+5x+1=
=x+y+4
licze na NAJ!