Question

Factorise the expression :
4-9p^4

Answer 1

$4 - {9p}^{4}$

$= {2}^{2} - { ({3p}^{2}) }^{2}$

Using identity a^2 - b^2 = (a+b)(a-b)

=

$(2 + {3p}^{2} )(2 - {3p}^{2} )$

Answer 2

Answer:

=>4-9p²

=> (2)²-(3p²)²

by the formulae :a²-b²=(a+b)(a-b)

=>(2+3p²)(2-3p²)