In the final answer, (8x-9) (x+5), why is 9 negative?
in order of operations by

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8x^2 +9x -19 = -22x +26 . . . 8x^2 +9x +22x -19 -26=0 . . . 8x^2 +31x -45=0 . . . (x-1.125)(x+5)=0
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