Factorise x^4 + 5x^2 + 9
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Answer:
- x^4 + 5^2+9
- x^4+6x^2+9-x^2
- (x^2+3)^2-x^2
- (x^2-x+3) ( x^2+x+3) ANS
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x^4 + 5^2+9
x^4+6x^2+9-x^2
(x^2+3)^2-x^2
(x^2-x+3) ( x^2+x+3) ANS
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