Dane są wielomiany W(x) = - + - 7x, G(x) = + - + 2. Wielomian W(x) - G(x) ma wzór:
a) -9x^{4} + x^{2} - 7x +2
b) -9x^{4} + 5x^{2} - 7x - 2
c) x^{4} + x^{2} - 7x + 2
d) x^{4} + x^{2} - 7x - 2
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W(x) - G(x)=2x⁵-4x⁴+3x²-7x - (2x⁵+5x⁴-2x²+2)=
=2x⁵-4x⁴+3x²-7x -2x⁵-5x⁴+2x²-2=
=2x⁵-2x⁵-4x⁴-5x⁴+3x²+2x²-7x-2=
=-9x⁴+5x²-7x-2
Odpowiedź B.