Question

18. If (2x - 3) (? + 6x + 9) = 8x³– 27, then ? will be replaced by

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Answer 1

Answer:

gyan prakash verma

Step-by-step explanation:

$(2x - 3)(? + 6x + 9) = (2x)^{3} - (3)^{3}$

$? = 4x^{2}$

because ;

${ {x}^{3} - y }^{3} = (x - y)( {x}^{2} + xy + y^{2} )$

So;

$({2x})^{3} - {3}^{3} = (2x - 3)( {4x}^{2} + 6x + 9)$