Decomposition factor: 16-8 (X-Y) + (X-Y) square

Decomposition factor: 16-8 (X-Y) + (X-Y) square

The original formula = (X-Y) &# 178; - 8 (X-Y) + 4 & # 178;
=[(x-y)-4]²
=(x-y-4)²

Square of factorization factor X + y-6 (x + y) + 9

(x+y)^2-6(x+y)+9
=(x+y-3)^2

How to decompose the factor of the square of X + 6x-9

=The square of (x-3) - formula method, the inverse of complete square formula

The square of Y minus 9 times the square of (x + y)

The original formula Y & sup2; - [3 (x + y)] & sup2;
=y²-(3x+3y)²
=(y+3x+3y)(y-3x-3y)
=-(3x+4y)(3x+2y)

If the equation x ^ 2-2 (m-4x) + 4 = 0 has real roots, find the value range of M

There are real roots
Then 4 (M-4) &# 178; - 16 ≥ 0
(m-4)²≥4
m-4≤-2,m-4≥2
m≤2,m≥6

Two fifths of a batch of goods are transported by four trucks. How many trucks will the rest be transported? How many parts of each truck are transported on average?

The rest needs: 4 △ 2 / 5-4 = 6 cars
Average transportation: 2 / 5 △ 4 = 1 / 10

Xiao Li mistakenly regards - x as + X when solving the equation 5A minus x equal to 13, and finds that the solution of the equation is x equal to - 2

5A + x = 13, the solution is x = - 2
So 5A + (- 2) = 13
5a=15
So it's 15-x = 13
x=15-13
x=2
If you don't understand this question, you can ask,

There is a pile of yellow sand on a construction site. The first time, 3.5% and 4 tons of yellow sand are used, and the second time, 8% and 5 tons less than the first time
How many tons of yellow sand are left?

There is a pile of yellow sand on a construction site. The first time, 3.5% and 4 tons of yellow sand are used, and the second time, 8% and 5 tons less than the first time. If the remaining yellow sand is 5% and 2 tons more than the sum of the previous two days, how many tons of yellow sand are left?
3 and 4 / 5 + (3 and 4 / 5-5 / 8) + 2 / 5
=(3 and 4 / 5 + 3 and 4 / 5 + 2 / 5) - 5 / 8
=8-5/8
=7.3/8 tons

If the line L and the line x + Y-1 = 0 are symmetric about the Y axis, then the equation of the line L

Then the equation of line L: X-Y + 1 = 0

There are 180 workers in a textile factory. The ratio of male to female workers is 2:7. How many male and female workers are there in this textile factory

2+7=9
Male workers account for 2 / 9 of the total number
The number of male workers is 180 × 2 / 9 = 40
Female workers: 180-40 = 140