Question

16c⁴-81d⁴ find the product​

Answer 1

Answer:

[(2c - 3d) (2c + 3d)] [4c² + 9d²]

Step-by-step explanation:

= [(2c)²]² - [(3d)²]²

Using identity,

(a² - b²) = (a - b) (a + b)

a = (2c)²

b = (3d)²

= [(2c)² - (3d)²] [(2c)² + (3d)²]

Using identity,

(a² - b²) = (a - b) (a + b)

= [(2c - 3d) (2c + 3d)] [4c² + 9d²]