(4x^2-9x-7)-(3x^2-5x-6),
4x^2-3x^2-9x+5x-7+6,
x^2-4x-1.
Answer: x^2-4x-1.
(4x² - 9x - 7) - (3x² - 5x - 6)=
4x²-3x-9x+5x-7+6=
x²-4x-1
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(4x^2-9x-7)-(3x^2-5x-6),
4x^2-3x^2-9x+5x-7+6,
x^2-4x-1.
Answer: x^2-4x-1.
(4x² - 9x - 7) - (3x² - 5x - 6)=
4x²-3x-9x+5x-7+6=
x²-4x-1