Question

factorise 9x^2-(3x+z)^2

Answer 1

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

$9 {x}^{2} - {(3x + z)}^{2}$

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

$= (3x + 3x + z)(3x - 3x - z)$

$= (6x + z)( - z)$

$= - z(6x + z)$

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