⇨ 2x² - 162
⇨ 2 ( x² - 81 )
⇨ 2 ( x² - 9x - 9x - 81 )
⇨ 2 { x ( x + 9 ) - 9 ( x + 9 ) }
⇨ 2 ( x - 9 ) ( x + 9 )
Answer:
2(x - 9)(x + 9)
Step-by-step explanation:
2x ^ 2 - 162
2 (x ^ 2 - 81)
2 (x ^ 2 - 9x - 9x - 81)
2 [x(x + 9) - 9(x + 9)]
2(x - 9)(x + 9)
