Question

factorise 25 upon 4 x square​

Answer 1

Explanation:

x4+x2+25

This can be written in the form,

⇒  (x2)2+2×x2×5+(5)2−9x2

⇒  [(x2)2+2×x2×5+(5)2]−(3x)2

⇒  (x2+5)2−(3x)2                              [ Since, a2+2ab+b2=(a+b)2 ]

⇒  (x2+5+3x)(x2+5−3x)             [ Since, a2−b2=(a+b)(a−b) ]

∴  The factors of x4+x2+25 are (x2+5+3x)(x2+5−3x)

Answer 2

The answer is in the given attachment....

✌︎Hope it helps u....✌︎