Question

81a square - 289b square.
Factorise. it​

Answer 1

Answer:

(9a + 17b)(9a - 17b)

Step-by-step explanation:

($81a^{2}$ - $289b^{2}$) is in the form ($a^{2} - b^{2}$)

∴ ($81a^{2}$ - $289b^{2}$)

 ⇒$[(9a)^{2} - (17b)^{2}]$

 ⇒(9a + 17b)(9a - 17b)