Doprowadź wyrażenia do prostszej postaci.
a) x(y+z-½)-5(x-4xz-xy)+5,5x
b) 6x(2x⁴+3x³-4x²-2x)-3x²(x³+6x²+6x)+30x³
c) 7(1-y)-7[2x²-5xy²-6x(x2-2y²)]+14x²(1-3x)
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a) x(y+z-½)-5(x-4xz-xy)+5,5x=
=xy+xz-½x-(5x-20xz-5xy)+5,5x=
=xy+xz-½x-5x+20xz+5xy+5,5x=
=21xz+6xy
b) 6x(2x⁴+3x³-4x²-2x)-3x²(x³+6x²+6x)+30x³=
=12x⁵+18x⁴-24x³-12x²-3x⁵-18x⁴-18x³+30x³=
=-12x²-42x³+8x⁵
c) 7(1-y)-7[2x²-5xy²-6x(2x-2y²)]+14x²(1-3x)=
7-7y-7(2x²-5xy²-12x²+12xy²)+14x²(1-3x)=
=7-7y-14x²+35xy²+84x²-84xy²+14x²(1-3x)=
=7-7y-14x²+35xy²+84x²-84xy²+14x²-42x³=
-7y+84x²-42x³-49xy²