Odpowiedź:
Szczegółowe wyjaśnienie:
a)
-(x + 1) + (2x + 4) = -x - 1 + 2x + 4 = x + 3
b)
(x + 4) + (2x + 6) = 3x + 10
c)
-(2y + 3x) + (-4y + 2x + 1) = -2y - 3x - 4y + 2x + 1 = -x - 6y + 1
d)
-(x - 2xy) - (4x + xy) + (xy - x) = -x + 2xy - 4x - xy + xy - x = -6x + 2xy
e)
(x² + 2x + 1) - (x² - 4x + 3) = x² + 2x + 1 - x² + 4x - 3 = 6x - 2
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Odpowiedź:
Szczegółowe wyjaśnienie:
a)
-(x + 1) + (2x + 4) = -x - 1 + 2x + 4 = x + 3
b)
(x + 4) + (2x + 6) = 3x + 10
c)
-(2y + 3x) + (-4y + 2x + 1) = -2y - 3x - 4y + 2x + 1 = -x - 6y + 1
d)
-(x - 2xy) - (4x + xy) + (xy - x) = -x + 2xy - 4x - xy + xy - x = -6x + 2xy
e)
(x² + 2x + 1) - (x² - 4x + 3) = x² + 2x + 1 - x² + 4x - 3 = 6x - 2