Question

find the value of expression 3a³-2b³+ab(a-b)when a=-3 and b=-4​

Answer 1

Answer:

$3a {}^{3} - 2b {}^{3} + ab(a - b)$

According to the question,

$= > 3 \times ({ - 3})^{3} - 2 \times ({ - 4})^{3} + ( - 3) \times - 4( - 3 - ( - 4)$

$= > 3 \times ( - 3) {}^{} \times ( - 3) \times ( - 3) - 2 \times ( - 4) \times ( - 4) \times( - 4) + ( - 3) \times - 4( - 3 + 4)$

$= > 3 \times ( - 27) - 2 \times ( - 64) + ( - 3) \times 12 - 16$

$= > - 81 + 128 - 36 -16$

$= > - 81 + 128 - 52$

$= > - 133 + 128$

$= > 5answer$

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