Factorise

Asked by ishmeet kaur Sidana | 21st Jul, 2013, 03:53: PM

Expert Answer:

xx2 + 25

= (x2)2 + 5x2

= [(x2)2 + 5+ 2 × x× 5 – 2 × x× 5] + x2

= [(x2)2 + 5+ 2 × x× 5] – 10xx2

= (x2 + 5)2 – 9x2

= (x2 + 5)2 – (3x)2

= [(x2 + 5) – 3x] [(x2 + 5) + 3x]

= (x2 – 3x + 5) (x2 + 3x + 5)

Answered by  | 21st Jul, 2013, 03:58: PM

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