Tuesday

July 22, 2014

July 22, 2014

Posted by **raven 31791** on Thursday, March 8, 2007 at 1:27am.

a)0,4i, -4i

b)0,-4,-4i

c)0,4,4i

d)0,4,-4

The equation can be rewritten

x(x^2 + 16) = 0

The function is zero if x = 0, OR if

x^2 = -16

That should give you a hint of what the roots are.

So you take the square root of -16 which gives you +- 4 making the answer d. Right?

No. The square root of -16 is 4i and -41.

i = sqrt (-1)

The answer is (a). I mistakenly typed

-41 for -4i

**Related Questions**

Pre-Calculus - The monthly revenue acheived by selling x boxes of candy is ...

Math - 2x(x+3) = 0 Is there a way to solve that using the below methods? ...

Pre Calculus 12 - Graphing trigonometric functions A sinusoidal function has a ...

calculus - Find the interval which contains a zero for the given function. The ...

calculus - Find the break-even point for the firm whose cost function C and ...

Calculus - Find the equation of the tangent line to the graph of the function f(...

factoring - can this equation be factored further? y= x^4+2x^3+4x^2+8x+16 Not in...

Calculus - An important problem in mathematics is that of root finding: that is...

Pre-Calculus - Find the inverse function for the function f(x)=2^(x)+1/2^(x)-1 ...

pre calc - The Identity Function The Squaring Function The Cubing Function The ...