3. Which of the following equations does not have a rational solution?
(A) x*x= 2
(B) x*x=1
(C) x*x=0
(D) x+x=0

Equation A doesn't have a rational solution

Step-by-step explanation:

Notice that the solutions for equation A is:

and is an irrational number

The other equations have rational solutions:

Equation B:  x = 1 and x = -1 are solutions (both rational numbers)

Equation C:  x = 0 is the solution (rational number)

Equation D : x = 0 is the solution. (rational number)

answer: c.  

step-by-step explanation:

mixtures containing substances that get attracted to magnet can be separated using a magnet. we can separate iron from a mixture of sand and iron, as only iron attracts to the magnet.