If | M-3 | + (n + 2) 2 = 0, then the value of M + 2n is______ ．

If | M-3 | + (n + 2) 2 = 0, then the value of M + 2n is______ ．

∵|m-3 | + (n + 2) 2 = 0, ∵ m − 3 = 0n + 2 = 0, the solution is m = 3N = − 2, ∵ m + 2n = 3-4 = - 1

If | m + 2 | + (n-1) ^ 2 = 0, then the value of M + 2n is

Because the absolute value, the square, is greater than or equal to zero
So it must be 0 + 0 = 0
So m = - 2, n = 1
So m + 2n = 0

If | m + 2 | + | n-1 | = 0, then the value of M + 2n is?

The absolute value is greater than or equal to 0
If one is greater than 0, then the other is less than 0
So both are equal to zero
So m + 2 = 0, n-1 = 0
m=-2,n=1
So m + 2n = - 2 + 2 = 0