Question

Q 12.
Factorize : (81x’ -16)
​

Answer 1

Answer:

(4$x$ - 4)(4$x$ + 4)

Step-by-step explanation:

=> 81$x^{2}$ - 16

=> (4$x$)² - 4²

=> (4$x$ - 4)(4$x$ + 4)                               [as (a² - b²) = (a-b)(a+b)]

Answer 2

Answer:(9x) ²-(4)²

(9x-4)(9x+4)

9x-4=0 or 9x+4=0

9x=4 or 9x=-4

x=4/9 or x=-4/9

Step-by-step explanation:4/9 and - 4/9 are the roots