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December 20, 2014

December 20, 2014

Posted by **Martha** on Friday, October 5, 2012 at 1:14am.

- college algebra -
**monic**, Friday, October 5, 2012 at 1:30am(x+2)(x^2-2x+4)(x-2)(x^2+2x+4)

- college algebra -
**Bosnian**, Friday, October 5, 2012 at 5:42amx ^ 6 - 64 = 0 Add 64 to both sides

x ^ 6 - 64 + 64 = 0 + 64

x ^ 6 = 64

x = sixth root of 64

x = + OR - 2

Solutions :

x = - 2

and

x = 2

- college algebra -
**Reiny**, Friday, October 5, 2012 at 8:36amsince you have a x^6 .... there will be 6 solutions including complex numbers.

Bosnian gave you the two real roots,

Monic only factored the expression, using the factored form we can find the 4 complex roots

x^2 - 2x + 4 = 0

x^2 - 2x + 1 = -4+1

(x-1)^2 = -3

x-1 = ±√3 i

x = 1 ± √3 i

In a similar way

x^2 + 2x + 4 = 0 gives us

x = -1 ±√3 i

(when solving quadratics with a coefficient of 1 for the x^2 term and an EVEN middle coefficient, I always use completing the square rather than the formula, it is faster and yields the answer in reduced form)

- college algebra -
**Sue**, Saturday, October 6, 2012 at 12:01pmx+8<4 help me self this please,

- college algebra -
**Ebony**, Sunday, October 7, 2012 at 7:33am5. Amand Heinl, an IRS auditor, took 45 minutes to process her first tax return. The IRS uses an 85% learning curve.

C. 2nd return take

D. 4th return take

E. 8th return take

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