Question

if ( x + y ) = 5 and xy = 6 then x^3 - y^3 = ?​

Answer 1

$( x + y ) = 5$

Since, only two number can make 5 by sum that is 2 and 3 and it can make 6 also by multiply together.

.°. x = 2 , y = 3

${x}^{3} - y {}^{3}$

${2}^{3} - {3}^{3}$

$8 - 27$

$19$

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