## steve816 one year ago Help me please! Easy question.

1. steve816

Can this be simplified?$\sqrt{4-x^2}$

2. steve816

@IrishBoy123 Do you know how to do this?

3. IrishBoy123

context? you can always factor $$4-x^2$$ but that doesn't make it simpler, least not to me :p

4. steve816

Wouldn't it be just 2-x

5. IrishBoy123

$$(2-x)(2+x)= 4 - x^2$$

6. steve816

Oh, okay

7. IrishBoy123

$$(2-x)^2 \ne 4 - x^2$$

8. steve816

Thanks for the help :)

9. IrishBoy123

:p