Question

ctorise the following by splitting the middle terms or by identities 16-81x²

Answer 1

Answer:

65

Step-by-step explanation:

Answer 2

Step-by-step explanation:

Identity

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

$16 - 81 {x}^{2} \\ \\ {4}^{2} - {9}^{2} {x}^{2} \\ \\ {4}^{2} - ({9x})^{2} \\ \\ (4 + 9x)(4 - 9x)$