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Mathematics, 13.09.2021 08:10 shan6171

What polynomial could you add to 3x4-9x3+5x2-x+7 to get a sum of 3+4x4+3x-x3+3x2? A: -x7+21x2+9x-6
B: 7x5+2x4-3x3+x2+6x-10
C: x4+8x3-2x2+4x-4
Some of you might can tell the exponents

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What polynomial could you add to 3x4-9x3+5x2-x+7 to get a sum of 3+4x4+3x-x3+3x2? A: -x7+21x2+9x-6...
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