Question

if a-b = 8 a^3-b^3 =-224 find ab

Answer 1

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Answer 2

Hello Mate!

a - b = 8 ( Given ) ____(1)

a³ - b³ = - 224 ( Given )

Whole cube of 1st equation

( a - b )³ = 8³

a³ - b³ - 3ab( a - b ) = 512

( - 224 ) - 3ab( 8 ) = 512

- 24 ab = 512 + 224

ab = 736 / - 24 or - 368 / 12 or - 184 / 6 or - 92/3

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