(x³-2x+1 )( x²+1 )+( x⁴+3x+2 )( x³-2x )=x⁵+x³-2x³-2x+x²+1+x⁷-2x⁵+3x⁴-6x²+2x³-4x=x⁷-x⁵+3x⁴+x³-5x²-6x+1
(2x⁴-3x+5 )( x³+4x+1 )+ (x³+2x) (x⁴-4x²)=2x⁷+8x⁵+2x-3x⁴-12x²-3x+5x³+20x+5+x⁷-4x⁵+2x⁵-8x³=3x⁷+6x⁵-3x⁴-3x³-12x²+19+5
w razie wątpliwości pisz na PW
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(x³-2x+1 )( x²+1 )+( x⁴+3x+2 )( x³-2x )=x⁵+x³-2x³-2x+x²+1+x⁷-2x⁵+3x⁴-6x²+2x³-4x=x⁷-x⁵+3x⁴+x³-5x²-6x+1
(2x⁴-3x+5 )( x³+4x+1 )+ (x³+2x) (x⁴-4x²)=2x⁷+8x⁵+2x-3x⁴-12x²-3x+5x³+20x+5+x⁷-4x⁵+2x⁵-8x³=3x⁷+6x⁵-3x⁴-3x³-12x²+19+5
w razie wątpliwości pisz na PW