metoda przeciwbych współczyników:
2x+3y=3
4x+3y=-9
2x + 3y = 3
4x + 3y = -9 ||*(-1)
+ -4x - 3y = 9
_____________
-2x = 12
-2x = 12 ||:(-2)
x = -6
2x+3y=3 /*-1
-2x-3y=-3
-----------
2x=-12 /2
x=-6
2*-6 +3y=3
-12+3y=3
3y=3+12
3y=15 /:3
y=5
SPR:
2*-6+3*5=3
-12+15=3
3=3
L=P
4*-6+3*5=-9
-24+15=-9
-9=-9
3y=3-2x
4x+(3-2x)=-9
2x+3=-9
2x=-9-3
2x=-12 /: 2
x=(-6)
3y=3-2(-6)
y=15:3
spr.
2(-6)+3razy 5=3
4(-6)+3razy 5=9
To jest napewno dobrze. ;d
Bo co jak co, ale z tego jestem dobra. ;]
" Life is not a problem to be solved but a reality to be experienced! "
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2x + 3y = 3
4x + 3y = -9 ||*(-1)
2x + 3y = 3
+ -4x - 3y = 9
_____________
-2x = 12
-2x = 12 ||:(-2)
x = -6
2x+3y=3 /*-1
4x+3y=-9
-2x-3y=-3
4x+3y=-9
-----------
2x=-12 /2
x=-6
2*-6 +3y=3
-12+3y=3
3y=3+12
3y=15 /:3
y=5
SPR:
2*-6+3*5=3
-12+15=3
3=3
L=P
4*-6+3*5=-9
-24+15=-9
-9=-9
L=P
2x+3y=3
4x+3y=-9
3y=3-2x
4x+(3-2x)=-9
3y=3-2x
2x+3=-9
3y=3-2x
2x=-9-3
3y=3-2x
2x=-12 /: 2
3y=3-2x
x=(-6)
3y=3-2(-6)
x=(-6)
3y=3+12
x=(-6)
y=15:3
x=(-6)
y=5
x=(-6)
spr.
2x+3y=3
4x+3y=-9
2(-6)+3razy 5=3
-12+15=3
4x+3y=-9
4(-6)+3razy 5=9
-24+15=-9
To jest napewno dobrze. ;d
Bo co jak co, ale z tego jestem dobra. ;]