Question

5. One of the factors of (x - y^)2 - 4(x - y) - 45 is (a) (x - y +9) (b) (x - y-5)​

Answer 1

Answer:

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Answer 2

Answer:

(x-y)^2-4(x-y)-45

=(x-y)^2-9(x-y)+5(x-y)-45

=(x-y)(x-y-9)+5(x-y-9)

=(x-y-9)(x-y+5)

so, one of the factor is (x-y-9)