1.
31 x + 36 xy +4y - 63 xy=31x+4y-27xy
2.
a)-2 (-x-y) + x (-a + y)=2x+2y-ax+xy
b)(7a + 3b) (2a + 4b)=14a^2 + 28ab +6ab +12b^2= 14a^2+12b^2+34ab
3.
- 24x + 16= 4( -6x + 4)
4.
a)9xy = 18,x # 0
9x*y=18 / :9x
y=18/9x
y=2/x
b)-2x -4y = 18 / :-2x
-4y=18/-2x
-4y=-9x / :-4
y=9/4 x
y=2 1/4 x
:)
1. -27xy + 31x + 4y
2.a) 2x + 2y -xa + xy b) 14a + 28ab + 6ab + 12b = 34ab +14a + 12b
3. 8(-3x+2)
nie wiem czy dobrze:p
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1.
31 x + 36 xy +4y - 63 xy=31x+4y-27xy
2.
a)-2 (-x-y) + x (-a + y)=2x+2y-ax+xy
b)(7a + 3b) (2a + 4b)=14a^2 + 28ab +6ab +12b^2= 14a^2+12b^2+34ab
3.
- 24x + 16= 4( -6x + 4)
4.
a)9xy = 18,x # 0
9x*y=18 / :9x
y=18/9x
y=2/x
b)-2x -4y = 18 / :-2x
-4y=18/-2x
-4y=-9x / :-4
y=9/4 x
y=2 1/4 x
:)
1. -27xy + 31x + 4y
2.a) 2x + 2y -xa + xy b) 14a + 28ab + 6ab + 12b = 34ab +14a + 12b
3. 8(-3x+2)
nie wiem czy dobrze:p