In Exercises 1344 factor the given expressions completely So

In Exercises 13-44, factor the given expressions completely.

Solution

16. 3ax -6ax⁴ -9a = 3a( x - 2x⁴ -3) = -3a (2x⁴ -x+ 3)

20. 25s⁴ - 36t² =( 5s)² -(6t)² = (5s +6t)(5s-6t) ( as a² - b² = (a+b)(a-b); here a = 5s and b = 6t)