MA BYĆ DOBRZE !!!!! JESLI NIEWIESZ NIE ROB !!! DAJE 18 PKT !!!
aha kwadrat pisze w skrocie (kw) !!!
DANE SA WYRAZENIA :
dla A= 3x(kw)+4xy-7
dla B=2x(kw)-4x-xy
dla c=-x+xy+y-3
A+(B-C)
(A-B)+C
B-(A+C)
(C-B)-A
prosze o rozwiazanie :)
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A+(B-C)=3x(kw)+4xy-7+[(2x(kw)-4x-xy)-(-x+xy+y-3)]= 3x(kw)+4xy-7+(2x(kw) -4x-xy+x-xy-y+3=3x(kw)+4xy-7+2x(kw) -4x-xy+x-xy-y+3= 5x(kw)+2xy-3x-y-4
(A-B)+C=[(3x(kw)+4xy-7)-(2x(kw)-4x-xy)]+-x+xy+y-3=3x(kw)+4xy-7-2x(kw)+4x+xy-x+xy+y-3=x(kw)+6xy+3x+y-10
B-(A+C)=2x(kw)-4x-xy-(3x(kw)+4xy-7-x+xy+y-3)=2x(kw)-4x-xy-3x(kw)-4xy+7+x-xy-y+3=-x(kw)-6xy-3x-y+10
(C-B)-A=[(-x+xy+y-3)-(2x(kw)-4x-xy)]-3x(kw)+4xy-7=-x+xy+y-3-2x(kw)+4x+xy-3x(kw)+4xy-7=-5x(kw)+6xy+3x+y-10