Question

(4.
Factorise:
(*) p4 - 81
5. Factorise: op​

Answer 1

Step-by-step explanation:

understood

SQUARE ROOT BOTHE THE SIDES

Answer 2

Answer:

we have , p4-81 =(p2)2-(92)2

Now using , a2-b2 = (a+b) (a-b), we have

(p2)2-(92)2= (p2+9)(p2-9)

(p2-9) = (p)2 -(3)2

= (p+3)(p-3)

p4-81 = (p+3)(p-3)(p2+9)