Question

Factorise
9x^2 - 64y^2
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Answer 1

$\Large{\blue{\tt{\underline{\underline{Question}}}}}$

${\sf{Factorise}}$

${\sf{✯ \ 9x²- 64y²}}$

$\Large{\orange{\tt{\underline{\underline{Answer }}}}}$

${\sf{⟹ \ 9x² \ - \ 64y²}}$

${\sf{⟹ \ (3x)² \ - \ (8y)²}}$

${\sf{⟹ \ (3x+8y) \ (3x-8y)}} \\{\bold{ \bigg( a²-b² \ = \ (a+b)(a-b) \bigg)}}$

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