4x^4 + 7x^2 -2
factorise,, !!
plz answer fast bord exam ahead..
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[tex]Solution: 4x^4 + 7x^2 -2
\\ = 4x^4 + 8x^2 - x^2 - 2 \\
= 4x^2( x^2 + 2) - 1 (x^2 + 2) \\
= (x^2 + 2) (4x^2 -1)[/tex]
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