Question

How do we do this question?​

Answer 1

Step-by-step explanation:

check ur answer................................

Answer 2

⠀⠀ || ✪.Solution.✪ ||

➥ 1/(2+√3) + 2/(√5 - √3) + 1/(2- √5)

( Rationalize Denominator )

➥ [1× (2+√3)/(2+√3)(2-√3)] + [2×(√5+√3)/(√5-√3)(√5+√3)]+ [ 1× (2+√5)/(2+√5)(2-√5) ]

➥ [ (2+√3)/(4-3) ] + [ 2 ×(√5+√3)/(5-3) ] [ (2+√5)/(4-5) ]

➥[ (2+√3)/1 ] + [ 2 × (√5-√3)/2 ] + [ (2+√5)/(-1) ]

➥ [ (2+√3)] + [ (√5-√3) ] - [ (2+√5) ]

➥ 2+√3 + √5-√3 - 2 - √5

➥ 0 [ Ans. ]

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Important Formula

★ (a+b)(a-b) = (a² - b² )

★ ( a + b )² = a² + b² + 2ab

★ (a + b )³ = a³ + b³ + 3ab (a+b)

★ a³ + b³ = (a+b)(a² + b² - ab )

★ a³ - b³ = (a-b)(a² + b² + ab )

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