It is known that 2x ^ 2m + 3 + 3Y ^ 5n-7 = 4 is a bivariate linear equation about X and y, and the value of m ^ 2-3n can be obtained Don't solve the unknowns directly, but use the first binary linear equations to solve them!

solution
is this one?
2x^(2m+3)+3y^(5n-7)=4
∵ is a quadratic equation of two variables
∴2m+3=1,5n-7=1
∴m=1,n=8/5
∴m²-3n
=1²-3×(8/5)
=1-24/5
=-19/5

&#It is known that 2x ^ (2m-3n-7) 3Y ^ (M + 3 + 6) = 8 is a quadratic equation of two variables about X and Y. how to find the value of n ^ 2m?

Because the original formula is a quadratic equation of two variables;
So (2m-3n-7) = 1, (M + 3 + 6) = 1;
╭（2m-3n-7）=1①
So
╰（m+3+6）=1②
The solution is m = - 8; n ≈ 7.7
So n ^ 2m = 7.7 ^ 2 * 8
Brother, did you copy the wrong question

If the power of 4m-4 of 6x + 3n-2 of 2Y - 3 = 0 is a binary linear equation, then the power of n of M=

4m-4=1
3n-2=1
The solution is m = 3 / 4, n = 1
So: the nth power of M = 3 / 4

If we change the quadratic equation 2x + 3Y = 4 into the form of y = KX + B, then B is divided into k parts=______ ．
Master solution

2x+3y=4
3y=-2x+4
y=-2x/3+4/3
k=-2/3
b=4/3
k/b=(-2/3)/(4/3)=(-2/3)(3/4)=-1/2.

When the side length of a square increases by one decimeter, the area of the square increases by five square meters. How many decimeters is the perimeter of the square?

If the area is increased by 5 square decimeters, then (x + 1) ^ 2 = x ^ 2 + 5, x = 2DM, the perimeter of the original square C = 4x = 8dm
If the area is increased by 5 square meters (500 square decimeters), then (x + 1) ^ 2 = x ^ 2 + 500, x = 249.5dm, the perimeter of the original square C = 4x = 998dm

An image in which a series of particles move harmonically over a period of time
Is the displacement of a certain point and time XYZ image, wavy
Sine in space?

It's a sine image

If you want to cut a 30 cm long, 20 cm wide rectangular cardboard into a small square with a full cm side length, how fast can you cut it at least?
A common factor is used to describe the steps of the method

The greatest common divisor of 30 and 20 is 10
So it can be cut into a square with a side length of 10 cm
It can be cut into six pieces

The relationship between linear velocity and period, as well as the relationship between angular velocity and period

Linear velocity and period: v = 2 π R / T or T = 2 π R / V
Angular velocity and period: w = 2 π / T or T = 2 π / W

As shown in Figure 4, the radius of the bottom of the cone is 1, and the length of the generatrix is 4. What is the shortest route for an ant to start from a point a on the circle of the cone and go around the side and return to a point

The diameter of the bottom circle is 2, so the perimeter of the bottom is equal to 2 π. Let the center angle of the fan-shaped circle after the expansion of the side of the cone be n ° and 2 π = 4N π / 180 according to the fact that the perimeter of the bottom is equal to the arc length of the fan-shaped circle after the expansion

Multiple choice questions (fill in the number of the only correct answer in brackets)
1. Add 1 to the numerator and denominator of the two fifths fraction at the same time, then the new fraction is compared with the original fraction, ()
(1) (2) the new score is larger than the original score. (3) the new score is smaller than the original score
2. A new fraction ()
(1) As big as the original score (2) 10 times larger than the original score (3) 10 times smaller than the original score

1 (2)
2 (3)

It is known that 2x ^ 2m + 3 + 3Y ^ 5n-7 = 4 is a bivariate linear equation about X and y, and the value of m ^ 2-3n can be obtained Don't solve the unknowns directly, but use the first binary linear equations to solve them!