Who can solve it? It is hard for me!!!!?

Question

The problem is this:

Sign this expresion. (x cubed)_2*(x squared)-5x+5

The problem is that I can not find the root of this expressin to say that if my x is bigger that that root its sign will be posetive or negative.

Please explain it as clear as you can. thanks a lot.

Answer 1

It's difficult to be clear when your question is as clear as mud.

How can you solve it if there's no equals sign?

You can multiply the terms to together. If you mean:

(x^2 divided by 2) multiplied by (x^2 - 5x + 5) , where x^2 is x squared.

Then

(x^4 - 5x^3 + 5x^2) divided by 2.

Answer 2

x^3 - 2x^2 - 5x + 5

(x^3 - 2x^2) (- 5x + 5)     group two of the number together

[x^2(x - 2)] [-5(x - 1)]      pull out a common factor from each binomail

since (x - 2) doesn't equal (x - 1), this problem has no solution