Question

49x^2-64 factorise answer fast

Answer 1

49 x^2 = 64
x^2 = 64/49
X = 8/7 or +8/7 .....
hope this helps !

Answer 2

given,

$49 {x}^{2} - 64$
using the identity

${a}^{2} - {b}^{2} = (a - b)(a + b)$
we have,

${(7x)}^{2} - {(8)}^{2}$
$= (7x - 8)(7x + 8)$