Podane sumy algebraiczne doprowadź do najprostrzej postaci. Licz sprytnie!
a) -5x + 2x - (-4y) - 2x + (-4y) =
b) 4a + 7b - 13a +2b - 7b + 13a =
c) -39 + 16 - 15d + 24 - (-15d) + d + 39c =
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a ) -5x + 2x - (-4y) - 2x + (-4y) = -5x
b) 4a + 7b - 13a +2b - 7b + 13a = 4a + 2b
c) -39 + 16 - 15d + 24 - (-15d) + d + 39c =1 + d + 39c
Powinno być ok .
a) -5x+2x+4y-2x-4y=-5x
b)=4a+2b
c)-39+16-15d+24+15d+d+39c=1+d+39c
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