Question: If the polynomial x - y + 11x + 7y + 18 can be factorized as (x + y + a)(x - y +

If the polynomial x - y + 11x + 7y + 18

If the polynomial x - y + 11x + 7y + 18 can be factorized as (x + y + a)(x - y + b), what is the value of a + b?

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