Find the value of x if \( \frac{\sqrt{2}}{x+\sqrt{2}} = \frac{1}{x-\sqrt{2}} \)

Assessment: JAMB UTME - Mathematics - 2020 Subject: General Mathematics

Question 1 Report

Find the value of x if \( \frac{\sqrt{2}}{x+\sqrt{2}} = \frac{1}{x-\sqrt{2}} \)

Answer Details

2√x+2 2 x + 2  = x - 12√ 1 2

x2–√ 2  (x - 2–√ 2 ) = x + 2–√ 2  (cross multiply)

x2–√ 2  - 2 = x + 2–√ 2  

= x2–√ 2  - x 

= 2 + 2–√ 2

x (2–√ 2  - 1) = 2 + 2–√ 2

= 2+2√2√−1×2√+12√+1 2 + 2 2 − 1 × 2 + 1 2 + 1

x = 22√+2+2+2√2−1 2 2 + 2 + 2 + 2 2 − 1  

= 32–√ 2  + 4 

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