0.32 * 12.5 * 2.5 4.25 / 2.5 * 9.9 + 0.17 are all simple operations 7.6 * 27 + 7.6 * 174-7.6 9.9*34

0.32 * 12.5 * 2.5 4.25 / 2.5 * 9.9 + 0.17 are all simple operations 7.6 * 27 + 7.6 * 174-7.6 9.9*34

0.32*12.5*2.5=1/10000*(32*125*25)=1/10000*(8*125*4*25) =1/10000*(1000*100)=104.25/2.5*9.9+0.17=1/100*(425/25*99)+17/100 =1/100[425/25*99+17] =1/100(17*99+17...

5-12 / 6 + 9-30 / 20 + 11 / 42 + 13 / 42

5/6-7/12+9/20-11/30+13/42
=1/2+1/3-1/3-1/4+1/4+1/5-1/5-1/6+1/6+1/7
=1/2+1/7
=7/14+2/14
=9/14

4、 The simplification ratio is higher
: 2 / 3 = 0.14: 0.56=
1:2: 1:4 = 2:0.5=

4、 The simplification ratio is higher
8:5:2:3 = 12:5 0.14:0.56 = 1:4
1:2: 1:4 = 2:1 2:0.5 = 4:1

-The opposite number of a + 2b-3c is______ ．

(a+2b+3c)(-a-3c-2b)

Calculation (1-2) * (2-3) * (3-4) *... * (2006-2007) * (2007-2008)

1-2)*(2-3)*(3-4)*.*(2006-2007)*(2007-2008)
=(-1)*(-1)*(-1)
… *(-1)
(2007-1) * 1 + 1 = 2007 items
-1*-1=1 -1*-1 *-1=-1
It can be seen that even numbers multiply to get positive 1 and odd numbers multiply to get - 1
2007 is singular, so it's - 1

Factorization of a & # 178; (X-Y) - 4B (Y-X) &# 178

a²(x-y)-4b(y-x)²
=a^2(x-y)-4b(x-y)^2
=(x-y)[a^2-4b(x-y)]
=(x-y)(a^2-4bx+4by)

Factorization, process 1, (x square + y Square) (x square + y square - 4) + 4 2, (9a square + 4B Square) 3, x + y = - 1, X-Y = - 3,
X square - y square=

(x^2+y^2)(x^2+y^2-4)+4
=(x^2+y^2)^2-4(x^2+y^2)+4
=(x^2+y^2-2)^2
(9a^2+4b^2)^2
=81a^4+72a^2b^2+16b^4
x^2-y^2
=(x+y)(x-y)
=-1*(-3)
=3

How to factorize a cubic formula
For example: x ^ 3 + 3x ^ 2-6x-8

Let me answer
At present, the formula is extremely complex, so we can only guess the root
If there is a root, there is a factor (x-root)
And then there's the quadratic, which can be decomposed
Give me the best. Is it hard?

The fourth power factorization of 61A and 4B
Sorry, wrong number. It's 64a to the fourth power - 4B to the fourth power

Look at my question