Question

by adding x³-x²-7x+3 to 3+7x+x²-x³
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Answer 1

Step-by-step explanation:

$( {x}^{3} - {x}^{2} - 7x + 3) + (3 + 7x + {x}^{2} - {x}^{3} ) \\ = {x}^{3} - {x}^{3} - {x}^{2} + {x}^{2} - 7x + 7x + 3 + 3 \\ = 3 + 3 \\ = 6$