Question

using identities factorisation​

Answer 1

Answer:

$3(25 {x}^{2} - 9) = 3( {(5x)}^{2} - {3}^{2} ) = 3(5x + 3)(5x - 3)$

Answer 2

Step-by-step explanation:

$75 {x}^{2} - 27 \\ = 3(25 {x}^{2} - 9) \\ = 3( {(5x)}^{2} - {3}^{2} ) \\ = 3(5x + 3)(5x - 3) \: \: \: as \: \: {a}^{2} - {b}^{2} = (a +v )(a - b)$