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Solve the following equation by factorization x+1x-1+x-2x+2 = 3 - Mathematics

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Question

Solve the following equation by factorization

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

Sum

Solution

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

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

⇒ `(x^2 + 2x + x + 2 + x^2 - x - 2x + 2)/(x^2 + 2x - x - 2)`

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

⇒ 2x2 + 4 = 3x2 + 3x - 6
⇒ 2x2 + 4 - 3x2 - 3x + 6 = 0
⇒ -x2 - 3x + 10 = 0
⇒ x2 + 3x - 10 = 0
⇒ x2 + 5x - 2x - 10 = 0
⇒ x(x + 5) - 2(x + 5) = 0
⇒ (x + 5) (x - 2) = 0
Either x + 5 = 0,
then x = -5
or
x - 2 = 0,
then x = 2
Hence x = -5, 2.

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Chapter 5: Quadratic Equations in One Variable - Exercise 5.2

APPEARS IN

ML Aggarwal Understanding ICSE Mathematics [English] Class 10
Chapter 5 Quadratic Equations in One Variable
Exercise 5.2 | Q 20.2
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