1.

Factorise the following​

Answer»

ANSWER:

\frac{225x ^{2} - 4y {?}^{2}  }{36}

Step-by-step EXPLANATION:

\frac{25x {?}^{2} }{4}  -  \frac{y {}^{2} }{9}  \\ lcm \: of \: 4 \: and \: 9 = 36 \\  \frac{225x {}^{2} - 4y {}^{2}  }{36} answer

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