Simplify the rational expression. state any excluded values. 2x/−5x +x^2

The given expression is

First we need to factor the denominator. And x is common in the denominator .

So we will get

Cancelling the common x of the numerator and denominator

And that's the simplified form .

Excluded values

Denominator should not be zero .

So the excluded values are x=0,5 .

a - base

b - exponent

so,

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.