Question

Please solve this problem
Answer is A
​

Answer 1

Answer:

Your answer is correct.

Step-by-step explanation:

Put the root in every L.H.S in x of the option, the answer which will come zero will be right. As you know the answer, I would do of "A".

(1 / 2 + √5) ² + 4 (1 / 2 + √5) - 1

{(1)² / (1 / 2 + √5)²} + 4(1 / 2 + √5) - 1

{ 1 + 4( 2 + √5) - 1( 2 + √5)² } / ( 2 + √5)²   (We took L.C.M)

{ 1 + 8 + 4√5 - 1 (4 + 4√5 + 5) } / ( 2 + √5)² (Used formulas (a+b)² )

{ 1 + 8 + 4√5 - 4 - 4√5 - 5) }/ ( 2 + √5)²

{0} / ( 2 + √5)²

0

And anything upon zero is zero. So, your answer A is correct.

Answer 2

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it's wrost platform

yrr answer is very simple ....

substitute the value of root and verify the equation...