If x – (2√5/x) = 7, then find the value of the expression (x2 –

1.	If x – (2√5/x) = 7, then find the value of the expression (x2 – 5x – 2√5)/[x2(x – 7)]?1. √52. √5/53. 1/54. 5√5
Answer» Correct Answer - Option 2 : √5/5 Given: x – (2√5/x) = 7 ⇒ x² – 2√5 = 7x Concept: Arrange the asked equation and put the value of the given equation in it to get the answer. Calculation: ∵ x² – 2√5 = 7x ------(1) ⇒ x² – 7x = 2√5 On arranging the equation = (x² – 5x – 2√5)/[x²(x – 7)] We get; [(x² – 2√5) – 5x]/[x(x² – 7x)] ⇒ (7x – 5x)/(x × 2√5) ⇒ 2x/(2√5x) ⇒ 1/√5 = √5/5

If x – (2√5/x) = 7, then find the value of the expression (x2 – 5x – 2√5)/[x2(x – 7)]?1. √52. √5/53. 1/54. 5√5

Answer» Correct Answer - Option 2 : √5/5

Given:

x – (2√5/x) = 7

⇒ x² – 2√5 = 7x

Concept:

Arrange the asked equation and put the value of the given equation in it to get the answer.

Calculation:

∵ x² – 2√5 = 7x ------(1)

⇒ x² – 7x = 2√5

On arranging the equation = (x² – 5x – 2√5)/[x²(x – 7)]

We get;

[(x² – 2√5) – 5x]/[x(x² – 7x)]

⇒ (7x – 5x)/(x × 2√5)

⇒ 2x/(2√5x)

⇒ 1/√5 = √5/5

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If x – (2√5/x) = 7, then find the value of the expression (x2 – 5x – 2√5)/[x2(x – 7)]?1. √52. √5/53. 1/54. 5√5

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