Question

(ii) y4 - 625
Factorise

Answer 1

Answer:

(y²+25)(y²-25)

Since,(y²-25) can further be factorise so,

(y²+25)(y+5)(y-5)

Hope it helps u

Answer 2

Step-by-step explanation:

$= {y}^{4} - 625 \\ = {( {y}^{2} )}^{2} - {(25)}^{2} \\ = ( {y}^{2} + 25)( {y}^{2} - 25) \\ = ( {y}^{2} + 25)( {(y)}^{2} - {(5)}^{2} ) \\ = ( {y}^{2} + 25)(y + 5)(y - 5)$