Question

Simplify the absolute value expression. assume mrepresents a positive real number. | m |

Answer 1

the first term is -x4. Since x4 is the square of x2, and squares of real numbers are always positive, -x4 is always negative.

So it is asking you to take the 4th root of a negative number. An even root of a negative number cannot be real. So the answer is NOT REAL.