Subtract the sum of 2x²-4x+11 and 7x²- 4x + 1 from the sum of 8x²- 7x-7 and 6x²+4x-6.
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Answer:
sum of 2x²-4x+11 and 7x²- 4x + 1
2x²-4x+11 + 7x²- 4x + 1
= 9x²-8x+12
sum of 8x²- 7x-7 and 6x²+4x-6
8x²- 7x-7 + 6x²+4x-6
= 14x²-3x-13
Subtraction
14x²-3x-13 - (9x²-8x+12)
= 14x²-3x-13 -9x²+8x-12
= 5x²+5x-25
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