Question

please give me my answer in your notebook

Answer 1

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Answer 2

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$\bold\pink{\huge{\: \:ANSWER \: :}}$

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We will proceed our solution following the formula :-

a³-b³ = (a-b) (a²+ab+b²)

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So, x³-1/x³

= (x)³ - (1/x)³

= (x-1/x) (x²+x. 1/x+1/x²)

= 5 (x²+1/x²+1)

= 5 (27+1)

= 5 × 28

= 140

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◼◼◼◼◼◼◼ How 27 Comes ? ◼◼◼◼◼◼◼

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On squaring both sides of the given expression, we get :

(x-1/x)² = (5)²

=> x² - 2.x.1/x + (1/x²) = 25

=> x²+1/x² = 25+2 or 27.

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⭐⭐⭐ ALWAYS BE BRAINLY ⭐⭐⭐

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