1. Doprowadź do najprostszej postaci. - GIMNAZJUM kl1.
a) 2(3a-4b+c)-5(3a+b-2c)
b) 7(x+2y-3z)+4(2x-3x-5z)
c) -3(-2a-4b-c)-6(a-2b-6c)
d) -5(2x+2y-6z)-(x-7y-3z)
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a) ...=6a-8b+2c-15a-5b+10c=-9a-13b+12c
b)..=.7x+14y-21z+8x-12x-20z=3x+14y-41z w drugim nawiasie chyba bylo y(zrobilam tak, jak zapisalas)
c) ...=6a+12b+3c-6a+12b+36c=24b+39c
d) ...=-10x-10y+30z-x+7y+3z=-11x-3y+33z
a) 2(3a-4b+c)-5(3a+b-2c)= 6a-8b+2c-15a+5b-10c=-9a-13b+12c
b) 7(x+2y-3z)+4(2x-3x-5z)=7x+14y-21z+8x-12x-20z=15x+2y-41z
c) -3(-2a-4b-c)-6(a-2b-6c)= 6a+12b+3c-6a+12b+36c=24b+39c
d) -5(2x+2y-6z)-(x-7y-3z)=-10x-10y+30z-x+7y+3z=-11x-3y+33z
liczę na naj ;D