No.
Yes, all real numbers are complex numbers.
The square roots of any positive real number are a positive and a negative real number. The square roots of any negative real number are a positive and a negative imaginary number. The square roots of any imaginary number or any complex number are two complex numbers.
The square root of a negative value is called an imaginary number.
No. Negative four is a real number. All real numbers are also complex numbers, so it is a complex number (but it's real, not nonreal)
No, it is a complex number.
Neither. (It is a complex number.)
The number that is one less than 7000, that is, 7000 - 1.
Complex numbers are the square roots of negative numbers. i.e. root -1 = i
No, it is an imaginary number which is a complex number.
4% of 7,000 = 4% * 7000 = 0.04 * 7000 = 280
The number 7000 in Luhya language is said as "Tsielefu sabaa".
No. It is a complex number, but that is something different.