x^4+2x^4+9 factorise
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x⁴+2x⁴+9
3x⁴+9
3(x⁴+3)
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3x⁴+9
3(x⁴+3)
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anuj2886:
wrong solution
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x^4+2x^4+9=0 ; 3x^4+9=0 ; 3x^3(x+3)=0 ; x= -3
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