7x²-5x+4,-9x²+4x-10,6x²-x-3
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Answer:
The answer is 4x²-2x-9.
Step-by-step explanation:
7x²-5x+4-9x²+4x-10+6x²-x-3
= 7x²-9x²+6x²-5x+4x-x+4-10-3
=4x²-2x-9
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