Question

multiply x+9y and x-5y​

Answer 1

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$x + 9y(x - 5y) \\ x(x - 5y) + 9y(x - 5y) \\ {x}^{2} - 5xy + 9xy - 45 {y}^{2} \\ {x}^{2} + 4xy - 45 {y}^{2} \\ {x}^{2} - 45 {y}^{2} + 4xy$

Answer 2

Answer: x²+4x- 45y²

Step-by-step explanation:

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

∴ x × (x+9y) - 5y (x+9y)

∴ x²+9xy - 5xy - 45y²

∴ x²+ 4x - 45y²