one more?

[rachael724]

A polynomial from the list below with zeroes of 2, -2, 1, and -1 would be

a. x 4 - 3x 2 - 4
b. x 4 + 5x 2 + 4
c. x 4 + 3x 2 - 4
d. x 4 - 5x 2 + 4
e. none of these

 

[happy]

x 4 and x 2?????? Make it CLEAR.

 

[rachael724]

????

 

[ting]

Which one factors in to this?

(x^2 - 4)(x^2 - 1) = 0

 

[happy]

??????? Exactly, that's what I thought when I read your unclear problem. :roll: Use this "^" for exponents, next time.

 

[rachael724]

sorry can you still help me?

 

[ting]

Expand. FOIL, this.

(x^2 - 4)(x^2 - 1)

 

[rachael724]

2x^2+5x^2+5

 

[rachael724]

2x^2+5x^2+5

 

[ting]

That is not an option from your list and one of them is correct.

Can you expand, FOIL, this.

(x - 4)(x - 1)