FACTORIZING 9

Factorize completely 7t – 28t³

Solution

= 7t – 28t³ 

= 7t(1 – 4t²)

= 7t(1 – 2²t²)

= 7t[(1)² – (2t)²]

From difference of two squares, a² – b² = (a-b)(a+b)

= 7t[(1 – 2t)(1 + 2t)]

= 7t (1 – 2t)(1 + 2t) answer

TRY THIS……………..

Factorize completely 7m – 63m³