Question

$25a {3} - 16a$
factorise the equation​

Answer 1

Answer:

First common the term a from both sides

$\tt25 {a}^{3} - 16a$

$\tt = \: a(25 {a}^{2} - 16)$

$\tt = \: a({(5a)}^{2} - 4 {}^{2} )$

$\tt = \: a(5a - 4 )(5a + 4)$