Question

Factorise: 49x² -64


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Answer 1

$49x² -64 \\ = {(7x)}^{2} - {8}^{2} \\ we \: know \: that \: ( {a }^{2} - {b}^{2} ) = (a + b)(a - b) \\ {(7x)}^{2} - {8}^{2} = \\ = (7x + 8) \: (7x - 8) \\ \\ { \huge { \red{ \ hope \: this \: helps \: u}}}$