Math, asked by SJ31, 1 year ago

pleaee answer this question .here after IF there is X

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Answered by rohitkumargupta
3
HELLO DEAR,

X = 1/(√5 - 2)

=> 1/(√5 - 2) × (√5 + 2)/(√5 + 2)

=> (√5 + 2)/(5 - 4)

=> X = (√5 + 2)

on squaring both side

we get,

x² = 5 + 4 + 4√5

=> x² = (9 + 4√5)

NOW,

x³ - 3x² - 5x + 3

=> x(x² - 3x - 5) + 3

=> (√5 + 2)(9 + 4√5 - 3 - 5) + 3

=> (9√5 + 18 + 20 + 8√5 - 5√5 - 10)

=> 12√5 + 28

=> 12√5 + 28 + 3

=> (12√5 + 31)

I HOPE ITS HELP YOU DEAR,
THANKS
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