Question

15x⁴+3x²-18 using identities factorise the following​

Answer 1

$15 {x}^{4} + 3 {x}^{2} - 18 \\ = > 15 {x}^{4} - 15 {x}^{2} + 18 {x}^{2} - 18 \\ = > 15 {x}^{2} ( {x}^{2} - 1) + 18 ( {x}^{2} - 1) \\ = > ( {x}^{2} - 1)(15 {x}^{2} + 18)$