Zad 1. Zapisz w jak najprostszej postaci:
a) 5(4x - 7) + (7 - 4x)=
b) (4x - y) - 2(x + y)=
c) 2(3x - 2y + 3z) -5( x - y - z)=
d) 4x(x - y - z) - 2x(4x - y + z)=
Proszę o pomoc :)
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a) 5(4x - 7) + (7 - 4x)=20x-35+7-4x=16x-28
b) (4x - y) - 2(x + y)=4x-y-2x-2y=2x-3y
c) 2(3x - 2y + 3z) -5( x - y - z)=6x-4y+6z-5x+5y+5z=x+y+11z
d) 4x(x - y - z) - 2x(4x - y + z)=4x²-4xy-4xz-8x²+2xy-2xz=-4x²-2xy-6xz
Pozdrawiam, proszę o naj ;)