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Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 9
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Syllabus

Find x3 – y3, if x – y = 5 and xy = 14. - Mathematics

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Question

Find x3 – y3, if x – y = 5 and xy = 14.

Sum

Solution

x – y = 5, xy = 14

x3 – y3  = (x – y)3 + 3xy(x – y)

= 53 + 3(14)(5)

= 125 + 210

= 335

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Expansion of (a - b)3
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Q 8
Chapter 3: Algebra - Exercise 3.4 [Page 101]

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Samacheer Kalvi Mathematics [English] Class 9 TN Board
Chapter 3 Algebra
Exercise 3.4 | Q 8 | Page 101

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