Question

x4-625 use identity and solve.​

Answer 1

Step-by-step explanation:

Using the identity a

2

−b

2

=(a+b)(a−b)

Using the above identity, the expression x

4

−625 can be factorised as follows:

x

4

−625=(x

2

)

2

−(25)

2

=(x

2

−25)(x

2

+25)=(x−5)(x+5)(x

2

+25)

Hence, x

4

−625=(x−5)(x+5)(x

2

+25)

Answer 2

Step-by-step explanation:

=[ x^2 ]^2- [5^2]^2

By using the identities (a^2 -b^2) = (a+b)(a-b)

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

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

hope it helps!!