Oblicz :
a) (5x +4xy +5y) - (2x - xy - 3y) + (-x+2xy+y) =
b)-(2a + 3 ab) - (2b - ab) + (5a - 2ab) - (-5v+4ab) =
c) 92x -3) - (x^2 - 3x +1) + (3x ^ 2 - 6x -5) =
d) (0,5a ^2 +a) - (0,7a ^2 - 3a +1) - (-0,2^2 + 1,2a ^2 + 1,2a - 1,5) =
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Oblicz :
a)
(5x +4xy +5y) - (2x - xy - 3y) + (-x+2xy+y) =
5x+4xy+5y-2x+xy+3y-x+2xy+y=
2x+9y+7xy
b)
-(2a + 3 ab) - (2b - ab) + (5a - 2ab) - (-5v+4ab) =
-2a-3ab-2b+ab+5a-2ab+5v-4ab=
3a-2b+5v-8ab
c)
(2x -3) - (x^2 - 3x +1) + (3x ^ 2 - 6x -5) =
2x-3-x^2+3x-1+3x^2-6x-5=
2x^2-x-9
d)
(0,5a ^2 +a) - (0,7a ^2 - 3a +1) - (-0,2^2 + 1,2a ^2 + 1,2a - 1,5) =
0,5a^2+a-0,7a^2+3a-1+0,2^2-1,2a^2-1,2a+1,5=
0,5a^2+a-0,7a^2+3a-1+0,04-1,2a^2-1,2a+1,5=
1,4a^2 + 2,8a +o,54