What is two seventh times minus five twelfth minus five seventh times five twelfth minus five third times one fourth

What is two seventh times minus five twelfth minus five seventh times five twelfth minus five third times one fourth

Original formula = 5 / 12 (2 / 7-5 / 7-1)
=5/12（-10/7）
=-25/42

3 out of 10 times 5 out of 9 is equal to?

3/10x5/9=1/6

Simple calculation (0.4 + 2 / 3) / (5 / 6-0.75) * 0.5

(0.4+2/3)/(5/6-0.75)*0.5
=（0.4*0.5+2/3**0.5）/（5/6-3/4）
=(0.2 + 1 / 3) / (5 / 6-3 / 4) [numerator and denominator multiply by 12]
=（2.4+4）/（10-9）
=6.4
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How to find the explanation of quadratic function
There are three explanations
1. Use the general formula (I can do this)
2. Use vertex form
The third one is related to quadratic equation

For example, if the vertex of a quadratic function is (3,5) and passes through (4,0), the analytic expression can be obtained. Let y = a (X-H) ＾ 2 + C, vertex (3,5) and passing through (4,0), then H = 3, C = 5. Substituting x = 4, y = 0, the value of a can be obtained, and then the analytic expression can be obtained

88888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888 + 88888888888 + 88 + 8 =? Simple algorithm
Work out the answer first!

8*(1111111111+111111111+11111111+1111111+111111+11111+1111+111+11+1)
=1234567900*8
=9876543200

Given a = {x | AX-1 > 0}, B = {x | x2-3x + 2 > 0} if a ∩ CRB ≠ empty set, find the range of real number a

B = {x | x2-3x + 2 > 0} x > 2 or X1 / A
A ∩ CRB ≠ empty set
Then 1 ≤ 1 / a < 2
Get 1 / 2

Simple operation: 102 times 100 / 101

102×100/101
=（101+1）×100/101
=101×100/101+100/101
=100+100/101
=100 and 100 out of 101

If one factor of polynomial (x + 2Y) 2-6x (x + 2Y) is x + 2Y, then the other factor is ()
A. 2x-5yB. -5x-2yC. -5x+2yD. 5x+2y

∵ (x + 2Y) 2-6x (x + 2Y) has a factor X + 2Y, ∵ (x + 2Y) 2-6x (x + 2Y) = (x + 2Y) (x + 2y-6x) = (x + 2Y) (2y-5x), then the other factor is: - 5x + 2Y

Under what circumstances is 1 + 1 not equal to 2

One glass of water and one glass of water or one glass of water

The equation 2x-3 + 4K + k-3x of X has the same solution

(x-k) / 2 = k-3x can be reduced to: 7x = 3K (1) 2x-3 = 4K (2) (1) (2) has the same solution, so the two equations are equivalent. Equation (2) can be reduced to 7x = 14K + (21 / 2), so 3K = 14K + (21 / 2) has the same solution: k = - 21 / 22,