Question

Factorise using identities : y^4-625

Answer 1

Answer:

here is your answer

Step-by-step explanation:

full explanation is in pic

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Answer 2

Answer:

$(y - 5)(y + 5)( {y}^{2} + 25)$

Step-by-step explanation:

Given ,

y⁴ - 625

= (y²)² - (25)²

Using the identity :

a² - b² = (a - b)(a +b) in the above polynomial

= (y²- 25)(y² + 25)

= (y² - 5²)(y² + 25)

Again , using the same identity we have :

= ( y - 5)(y + 5)(y² + 25)