Given the two roots of the equation 2x ^ 2-2 (2m-1) x + (M + 2) = 0, we can find the value range of m in the interval (- 3,3)

The distribution of roots of quadratic function
Let f (x) = 2x ^ 2-2 (2m-1) x + (M + 2)
When there are two different heels, the axis of symmetry is between (- 3,3), f (- 3) > 0, f (3) > 0, △ > 0
Delta = 0, check again

6-6X = 1.2 * 4 solved by equation

6x-6 = 0

6x-6=0
6x=6
x=1

What is 1000 divided by 0.2?

1000 and 0.2 can be multiplied by 10 at the same time, so 1000 divided by 0.2 equals 10000 divided by 2, so it's 5000

Seventh grade volume 1 mathematical formula
Thank you very much

All mathematical formula multiplication and factoridecomposition of all mathematical formula multiplication and all mathematical formula multiplication and factoridecomposition of all mathematical formula multiplication and factoridecomposition of all mathematical formula multiplication and factoridecomposition of all mathematical formula multiplication and factoridecomposition of all mathematical formula multiplication and factoridecomposition of all mathematical formula multiplication and factoridecomposition of all mathematical formula multiplication and factoridecomposition of all mathematical formula multiplication and factoridecomposition of all mathematical formula multiplication and factoridecomposition of all mathematical formula multiplication and factoridecomposition of all mathematical formula multiplication and factoridecomposition of all mathematical formula multiplication and factoridecomposition of all mathematical formula multiplication and factoridecomposition of A2-B2 (A2 (a + b) (a + b) (a2-ab (a2-ab) (a2-ab + b) (a2-ab + b) (a2-ab + AB + AB + B2) (a2-ab + B2) A3 (a-b) (A2 + AB + AB + AB + AB + AB + AB + AB + B2) all mathematical formula multiplication and all mathematical formula multiplication and all mathematical formula multiplication and factoridecomposition of all mathematical formula multiplication and factoridecomposition of all mathematical formula multiplication of all mathematical formula multiplication and factoridecomposition of all mathematical formula multiplication of all mathematical formula multiplication and factorithe solution of quadratic equation with one variable - B +

What is 108 degrees, 28 minutes, 35 seconds / 5

(108 degrees, 28 minutes, 35 seconds) / 5
=(108 degrees (28 + 35 / 60) minutes) / 5
=(108 degrees 28.5833 points) / 5
=((108 + 28.5833 / 60) degrees) / 5
=(108.47639 degrees) / 5
=69528 degrees
=21 degrees 0.69528 * 60 minutes
=21 degrees 41.71667 points
=21 degrees 41 minutes (0.71667 * 60) seconds
=21 degrees 41 minutes 43 seconds

When B = - 1, then from - 2

Square of a - square of AB part of a - square of B (a + a part of 2Ab + b)
=(a+b)(a-b)/a(a-b)÷(a^2+2ab+b^2)/a
=[(a+b)/a]*a/(a+b)^2
=1/(a+b)
When B = - 1
Original formula = 1 / (A-1)
From - 2

Here's a math problem, ask a master to solve it (no equations)
It takes 6 hours for car a to go from city a to city B, and it takes 8 hours for car B to go from city B to city A. now, two cars are going from city a and city B at the same time. Three hours later, the distance between the two cars is 20 kilometers. How many kilometers is the distance between city a and city B? (no equation)

Speed a = 1 / 6, speed B = 1 / 8,
A. Distance b: 20 △ [1 - (1 / 6 + 1 / 8) × 2] = 160 (km)

Solving the equation by collocation method: 2x square + 8x-7 = 0
To solve the equation: (1) xsquare - x = 0 (2) xsquare + 4x-21 = 0. To solve the equation by collocation method: (3) 2xquare + 8x-7 = 0

(1) Common factor: X (x-1) = 0, so X1 = 0, X2 = 1; (2) cross multiplication: (x + 7) (x-3) = 0, so X1 = - 7, X2 = 3; (3) 2 (x ^ 2 + 4x + 4-4) - 7 = 0, 2 (x + 2) ^ 2-15 = 0, (x + 2) ^ 2 = 15 / 2, x + 2 = ± (√ 30) / 2, so X1 = - 2 - (√ 30) / 2, X2 = - 2 + (√ 30) / 2, if you don't understand, please hi me

Given the two roots of the equation 2x ^ 2-2 (2m-1) x + (M + 2) = 0, we can find the value range of m in the interval (- 3,3)