When a is what kind of real number, the following formula has meaning in the range of real number: (1) a + 2 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; (2) 3 − a

When a is what kind of real number, the following formula has meaning in the range of real number: (1) a + 2 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; (2) 3 − a

(1) From the quadratic radical, we can get: a + 2 ≥ 0, the solution is a ≥ - 2; (2) from the quadratic radical, we can get: 3-A ≥ 0, the solution is a ≤ 3

M is a real number, find z = (m2-5m + 6) + (m2-3m) I, (1) real number (2) imaginary number (3) pure demand

(1) square of real number m - 3M = 0 m = 0 m = 3
(2) The square of imaginary number m - 3M ≠ 0 m ≠ 0 m ≠ 3
(3) The square of pure demand m - 5m + 6 = 0, the square of M - 3M ≠ 0
M square - 5m + 6 = 0 m = 2 m = 3
The square of M - 3M ≠ 0 m ≠ 0 m ≠ 3
Pure demand M = 2

Find all possible values of real number x that make the following equation true
1.8x cube (cube of x) + 1 = 0
2 2x square (the square of x) - 1 = 0 (accurate to 0.01)

1. X equals - 1 / 2
2. X equals plus or minus 0.71

Given that a is a real number, find √ (a + 2) &# 178; - √ (A-1) &# 178

=|a+2|-|a-1|
(1) a