36 times the square of A-25 times the square of B-10 times B-1

36 times the square of A-25 times the square of B-10 times B-1

36 times the square of A-25 times the square of B-10 times B-1
=36 times the square of a - (25 times the square of B + 10 times B + 1)
=36 times the square of a - (5 times B + 1)
=(6a-5b-1)(6a+5b+1)

The square of a number is 36. The number is

Plus or minus six

Cos2 α / sin (α - π / 4) = √ 2 / 2 find the value of sin α + cos α

cos2a=cos²a-sin²a=(cosa+sina)(cosa-sina)
sin(a-π/4)=sinasinπ/4-cosacosπ/4=√2/2 (sina-cosa)
cos2a/sin(a-π/4)=√2/2
(cosa+sina)(cosa-sina)/[√2/2 (sina-cosa)]=√2/2
cosa+sina=-1/2

As shown in the figure, it is known that the two ends of the diameter AB passing through the circle O are the perpendicular lines am, BN and the perpendicular feet of the tangent line passing through the other point C on the circle O are m and N respectively

A: the quadrilateral amnb connecting OC is a right angled trapezoid, and O is the midpoint of AB, OC is perpendicular to Mn, so OC is the median line of right angled trapezoid, so 2oC equals BN + am, and because 2oC = AB, ab = am + BN

If point a (m, - 2) is on the image of inverse scale function y = 4x, then when function value y ≥ - 2, the value range of independent variable x is______ ．

∵ point a (m, - 2) is on the image of inverse scale function y = 4x, M = - 2. When function value y ≥ - 2, the value range of independent variable x is x ≤ - 2 or X ＞ 0. So the answer is: X ≤ - 2 or X ＞ 0

According to the quantity relation series equation, the solution of the equation is obtained. X is 2 times more than 3.6 by 0.8

The function f (x) = 2x ^ 2-mx + 3, when x ∈ [- 2, + infinity), is an increasing function, when x ∈ (- infinity, 2], is a decreasing function, find the value of F (1)

∵ f (x) is an increasing function in X ∈ [- 2, + ∞) and a decreasing function in X ∈ (- ∞, - 2)
The abscissa of the vertex of parabola f (x) is - 2
∴f(x)=2x^2-mx+3=2(x+2)^2+n=2x^2+8x+8+n
∴m=-8,n=-5
∴f(x)=2x^2+8x+3
∴f(1)=2*1^2+8*1+3=13

What is 33 out of 70 divided by 11

3\70

Let set 12345 select two nonempty subsets, and the minimum number of subset B is greater than the maximum number of subset A. There are several methods

Method 1
Let C = a ∪ B and n be the number of C elements

0 is the solution of equation 12-5x = 12, right?
Such as the title

That's right