How do you factor 343x^4-27x ?

I only know how to do cubic roots like (x^3-64)

Please help!!!!!!

Comments

  • 343x^4-27x

    x(343x^3-27)

    x(7x-3)(49x^2+21x+9)

  • 343x^4 - 27x

    = x(343x^3 - 27)

    = x( 7x^3 - 3^3 ) { a^3 + b^3= (a+b)( a^2 - ab + b^2)

    = x(7x-3)(49x^2+21x+9)

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