a) A=(2,1) B=(1,-2) uklad rownan {1=2a+b {-2=a+b {1-2a=b {-2-a=b 1-2a=-2-a -2a+a=-2-1 -a=-3 a=3 b=1-2a b=1-2*3 b=1-6 b=-5 y=3x-5 b) A=(3,-1) B=(2,2) uklad rownan {-1=3a+b {2=2a+b {-1-3a=b {2-2a=b -1-3a=2-2a -3a+2a=2+1 -a=3 a=-3 b=2-2a b=2-2*(-3) b=2+6 b=8 y=-3x+8 licze na naj
y=ax+b a) A 1=a*2+b 1=2a+b B -2=a+b 1=2a+b |1=2a+b |1=2a+b |1=2(-b-2)+b |1=-2b-4+b |1=-b-4 -2=a+b |-a=b+2/(-1) |a=-b-2 |a=-b-2 |a=-b-2 |a=-b-2 b=-4-1 | b=-5 |b=-5 |b=-5 a=-b-2 | a=-(-5)-2 | a=5-2 |a=3 y=3x-5 b) A -1=3a+b |-1=3a+b |-1=3a+b |-1=3a+-2a+2 |-1=a+2 B 2=2a+b |-b=2a-2 /(-1) |b=-2a+2 |b=-2a+2 |b=-2a+2 -a=2+1 /(-1) |a=-2-1 |a=-3 |a=-3 |a=-3 b=-2a+2 |b=-2a+2 |b=-2*(-3)+2 |b=6+2 |b=8 y=-3x=8
