Question

plz Ans guys ..!! please dont spam..!!
ans this twoo plz ​

Answer 1

Answer:

(16a²-81b²) / 4a-9b

$= \frac{16 {a}^{2} - 81 {b}^{2} }{4a - 9b}$

Applying a²-b² =( a+b )(a-b)

.

$= \frac{(4a) {}^{2} - (9b) {}^{2} }{4a - 9b} \\ = (4a + 9b)(4a - 9b) \div 4a - 9b$

.

$= 4a + 9b$

the last option is correct but the answer in book is wrong

The correct answer is :- 4a+9b

tick the option d by making change from (4a+ab) to ( 4a+4b )