Question

If 2m−3n =9 and mn=4, evaluate 8m3 − 27n3
PLEASE ANSWER PROPERLY

Answer 1

Answer:

Reffered to the attachment

Step-by-step explanation:

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Answer 2

Answer:

$8m^{3} - 27n^{3} = 837$

Step-by-step explanation:

$(2m - 3n)^{3} = 8m^{3} - 26n^{3} -3mn(2m - 3n)$

$9^{3} = 8m^{3} - 27n^{3} - 3(4)(9)$

$729 = 8m^{3} - 27n^{3} - 108$

∴ $8m^{3} - 27n^{3} = 729 + 108$

$8m^{3} - 27n^{3} = 837$