Question

7. (y-7)(y + 3)
11. (xy + 6) (xy-5)
15. (ab - 13) (ab - 4) please answer me jisne answer correct diya i thanks your answer and follow​

Answer 1

⭐Answer:

1.(y-7) (y+3)

→ y(y+3) -7(y+3)

→ y²+3y-7y-21

→ y²-4y-21

2. (xy+6) (xy-5)

→ xy(xy-5) +6(xy-5)

→ x²y²-5xy+6xy-30

→ x²y²+1xy-30

3.(ab-13) (ab-4)

→ ab(ab-4) -13(ab-4)

→ a²b²-4ab-13ab+52

→ a²b²-17ab+52

Answer 2

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