Question

ребята срочно нужно сделать помогите пожалуйста (40 б.)​

Answer 1

Ответ:

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1) a/3 - b/3 = (a - b)/3

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2) (7x - 5)/8x² + (3x + 5)/8x² = (7x - 5 + 3x + 5)/8x² = 10x/8x² = 5/4x

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3) -(a - 12b)/27a + (a + 15b)/27a = (-a + 12b + a + 15b)/27a = 27b/27a = b/a

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4) (10a + 6b)/11a³ - (6b - a)/11a³ = (10a + 6b - 6b + a)/11a³ = 11a/11a³ = 1/a²

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5) c²/(c - 9) - 81/(c - 9) = (c² - 81)/(c - 9) = (c - 9)(c + 9)/(c - 9) = c + 9

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6) (2x - 4y)/(x - 3y) - (4x - 14y)/(3y - x) = (2x - 4y)/(x - 3y) - (-(4x - 14y))/(-(3y - x)) = (2x - 4y)/(x - 3y) - (-4x + 14y)/(x - 3y) = (2x - 4y + 4x - 14y)/(x - 3y) = (6x - 18y)/(x - 3y) = 6(x - 3y)/(x - 3y) = 6

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