phân tích thành nhân tử ( Đặt nhân tử chung)

Đáp án`+`Giải thích các bước giải:

` 2) x(y + 1) + 8(y + 1) `

` = (x + 8)(y + 1) `

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` 5) 3x(x + 5) - 2(5 + x) `

` = 3x(x + 5) + 2(x + 5) `

` = (3x + 2)(x + 5) `

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` 8) x(y - 1) - y(1 - y) `

` = x(y - 1) + y(y - 1) `

` = (x + y)(y - 1) `

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` 11) 3x(x - 2) + 5(2 - x) `

` = 3x(x - 2) - 5(x - 2) `

` = (3x - 5)(x - 2) `

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` 14) 3(x - y) - 5x(y - x) `

` = 3(x - y) + 5x(x - y) `

` = (3 + 5x)(x - y) `

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` 17) x(2y - 1) - 5(2y - 1) `

` = (x - 5)(2y - 1) `

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` 20) 3x(x - y) + 6(y - x) `

` = 3x(x - y) - 6(x - y) `

` = (3x - 6)(x - y) `

` = 3(x - 2)(x - y) `

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` 23) 3x(x - 2y) + 6y(2y - x) `

` = 3x(x - 2y) - 6y(x - 2y) `

` = (3x - 6y)(x - 2y) `

` = 3(x - 2y)(x - 2y) `

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` 26) 2x(x + y) - 6x^2 (x + y) `

` = (2x - 6x^2)(x + y) `

` = 2x(1 - 3x)(x + y) `

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` 29) 10xy(x - y) - 6y(y - x) `

` = 10xy(x - y) + 6y(x - y) `

` = (10xy + 6y)(x - y) `

` = 2y(5x + 3)(x - y) `

` tt (@NgManh06) `