Question

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Answer 1

Answer:

${a}^{3} + {b}^{3} + {c}^{3} = (a + b + c)( {a}^{2} + {b}^{2} + {c}^{2} - ab - bc - ac)$

$= (a + b + c)( {(a + b + c)}^{2} - 2(ab + bc + ac) - (ab + bc + ac))$

Insert the values!

$(5)( {(5)}^{2} - 2(10) - (10))$

= ( 5 )( 25 - 20 -10)

= ( 5 )( -5 )

= -25

Hope it helps you!

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