Question

factorise 9x² - 25x²​

Answer 1

Step-by-step explanation:

$9 {x}^{2} - 25 {x}^{2}$

$= ( {3x)}^{2} - ( {5x)}^{2}$

$= (3x + 5x)(3x - 5x)$

$= 8x \times - 2x$

$= - 16 {x}^{2}$

Answer 2

Answer:

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