Question

14.2 8th standerd p ^ 4 - 81

Answer 1

Correct Question:

Factorise: $p^{4} -81$

Solution:

$:\implies (p^{2}) ^{2} -(9)^{2} \\:\implies (p^{2}-9)(p^{2} +9)\\:\implies (p^{2} - 3^{2} ) (p^{2} +9)\\:\implies (p-3)(p+3)(p^{2} +9)$