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Solve the following equation by factorization: 1/((x – 2)) + 2/((x – 1)) = 6/x

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प्रश्न

Solve the following equation by factorization:

`1/((x - 2)) + 2/((x - 1)) = 6/x`

योग
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उत्तर

Given,

⇒ `1/(x - 2) + 2/(x - 1) = 6/x`

⇒ `((x - 1) + 2(x - 2))/((x - 2)(x - 1)) = 6/x`

⇒ `(x - 1 + 2x - 4)/(x^2 - x - 2x + 2) = 6/x`

⇒ `(x - 1 + (2x - 4))/(x^2 - 3x + 2) = 6/x`

⇒ `(3x - 5)/(x^2 - 3x + 2) = 6/x`

⇒ x(3x – 5) = 6(x2 – 3x + 2)

⇒ 3x2 – 5x = 6x2 – 18x + 12

⇒ 6x2 – 3x2 – 18x + 5x + 12 = 0

⇒ 3x2 – 13x + 12 = 0

⇒ 3x2 – 9x – 4x + 12 = 0

⇒ 3x(x – 3) – 4(x – 3) = 0

⇒ (3x – 4)(x – 3) = 0

⇒ (3x – 4) or (x – 3) = 0   ...[Using zero-product rule] 

⇒ 3x = 4 or x = 3

⇒ x = `4/3` or x = 3

Hence, `x = {3, 4/3}`.

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अध्याय 5: Quadratic Equation - EXERCISE 5A [पृष्ठ ५३]

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आर.एस. अग्रवाल Mathematics [English] Class 10 ICSE
अध्याय 5 Quadratic Equation
EXERCISE 5A | Q 39. | पृष्ठ ५३
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