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Solve the following equation by factorization: (x + 3)/(x – 2) – (1 – x)/x = 4 1/4

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Question

Solve the following equation by factorization:

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

Sum
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Solution

Given,

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

⇒ `(x(x + 3) - (1 - x)(x - 2))/(x(x - 2)) = 17/4`

⇒ `(x^2 + 3x - (x - 2 - x^2 + 2x))/(x^2 - 2x) = 17/4`

⇒ `(x^2 + 3x - (3x - 2 - x^2))/(x^2 - 2x) = 17/4`

⇒ `x^2 + 3x - 3x + 2 + x^2 = 17/4 xx (x^2 - 2x)`

⇒ 4(2x2 + 2) = 17 × (x2 – 2x)

⇒ 8x2 + 8 = 17x2 – 34x

⇒ 17x2 – 34x – 8x2 – 8 = 0

⇒ 9x2 – 34x – 8 = 0

⇒ 9x2 – 36x + 2x − 8 = 0

⇒ 9x(x – 4) + 2(x – 4) = 0

⇒ (9x + 2)(x – 4) = 0

⇒ (9x + 2) or (x – 4) = 0   ...[Using zero-product rule] 

⇒ 9x = –2 or x = 4

⇒ x = `(-2)/9` or x = 4

Hence, `x = {4, (-2)/9}`.

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Chapter 5: Quadratic Equation - EXERCISE 5A [Page 53]

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R.S. Aggarwal Mathematics [English] Class 10 ICSE
Chapter 5 Quadratic Equation
EXERCISE 5A | Q 38. | Page 53
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