(x + 9)(x - 2) + (x - 7)
Now first we do the multiplication, so
(x^2 - 2x + 9x - 18) + (x - 7)
(x^2 + 7x - 18) + (x - 7)
Now we do the rest(addition), we get
x^2 + 7x - 18 + x - 7
x^2 + 7x + x - 18 - 7
x^2 + 8x - 25
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