W(x)=2x³+3x²-1
H(x)=x²+x+2
a)
W(x) × H(x) = (2x³+3x²-1)×(x²+x+2)
W(x) × H(x) = 2x⁵+2x⁴+4x³+3x⁴+3x³+6x²-x²-x-2
W(x) × H(x) = 2x⁵+5x⁴+7x³+5x²-x-2
b)
2×W(x) - H(x) = 2 ×(2x³+3x²-1) - (x²+x+2)
2×W(x) - H(x) = 4x³+6x²-2-x²-x-2
2×W(x) - H(x) = 4x³+5x²-x-4
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W(x)=2x³+3x²-1
H(x)=x²+x+2
a)
W(x) × H(x) = (2x³+3x²-1)×(x²+x+2)
W(x) × H(x) = 2x⁵+2x⁴+4x³+3x⁴+3x³+6x²-x²-x-2
W(x) × H(x) = 2x⁵+5x⁴+7x³+5x²-x-2
b)
2×W(x) - H(x) = 2 ×(2x³+3x²-1) - (x²+x+2)
2×W(x) - H(x) = 4x³+6x²-2-x²-x-2
2×W(x) - H(x) = 4x³+5x²-x-4