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$x=19$ এবং $y=-12$ হলে, $8x^3+36x^2y+54xy^2+27y^3$ এর মান নির্ণয় কর।

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দেওয়া আছে, $x=19$ এবং $y=-12$

প্রদত্ত রাশি,
$8x^3+36x^2y+54xy^2+27y^3$

$=\left(2x\right)^3+3\cdot\left(2x\right)^2\cdot3y+3\cdot2x\cdot\left(3y\right)^2+\left(3y\right)^3$

$=\left(2x+3y\right)^3$

$=\left\lbrace2\times19+3\times\left(-12\right)\right\rbrace^3$

$=\left(38-36\right)^3$

$=\left(2\right)^3$

$=8$ [Answer]

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