Question

factorise.
$25{x}^{2} - {y}^{4}$
factorise​

Answer 1

(5x+y^2)(5x-y^2)

This answer was obtain by factorising by grouping .

Answer 2

Answer:

The answer is $(5x+y^2)(5x-y^2)$

Step-by-step explanation:

   $25x^2-y^4$

$=(5x)^2-(y^2)^2$, write in the form of $a^2-b^2$

$=(5x+y^2)(5x-y^2)$, using $a^2-b^2=(a-b)(a+b)$