Dial 5 beads in the counter to indicate which two digits? Write 4

50 41 32 14 23

Is the square root of the real number a right

No, because when a is less than 0, the root of a real number is meaningless

Is the question "the square root of the square of a under the real root sign is positive or negative a"

That's right

It is known that the square root of positive number m is 3a-5 and 1-A. try to find the square root of M

Because the two square roots of a positive number are opposite to each other, 3a-5 + (1-A) = 0, the solution is a = 2, that is, the two square roots are 1, - 1

If the two square roots of a positive number are m + 1 and M-3, then M=______ ．

From the meaning of the question: M + 1 + M-3 = 0, the solution: M = 1

4 / 9 / 6 = x / 15 to solve the equation,

4 / 9 / 6 = x / 15
X÷15 =8/3
X=8/3×15
X=40

Solution equation: (9 / 10-2 / 5) - x = 1 / 4

（9/10-4/10）-x=1/4
（9-4/10）-x=1/4
1/2-x=1/4
x=1/4

X = 5 / 6 = 5 / 9

X∶﹙5／6﹚=5／9
9X=25／6
X=25／54

For example, 7 (x + y) = 5 (x + y) has two unknowns with equal sign, but it is not an equation, and is it an equation whose XY on both sides can be eliminated?

Is the equation, the definition of the equation: contains the unknown number of the equation
This equation is indefinite. When it is only one, there are infinite solutions
Its solution is x + y = 0
It can't be eliminated at will
The solution is to shift the term, merge the similar term and reduce the constant term

In the equation 3 ? - 2 ? = 15, the two numbers of the two equations are opposite to each other, and the equation holds. The number of the box is?
kuai
There is another problem that can be solved, but not solved
1. Given that the solution of equation 2aX + 1 = 5 is the same as that of equation 5x + 10 = 0, find the value of A
2. It's gone

The first one is 5 *? = 15. The first one is 3 and the last one is - 3
In the second question, 2aX + 1 = 5, i.e. 2ax-4 = 0, the left and right sides of the equation are in the same path - 2.5 to get - 5AX + 10 = 0. Compared with the latter equation, we can get - 5AX = 5x, a = - 1

Dial 5 beads in the counter to indicate which two digits? Write 4