The value of 3x (X-Y) ^ 3-6y (Y-X) ^ 2

The value of 3x (X-Y) ^ 3-6y (Y-X) ^ 2

The factorization is as follows
3x(x-y)^3-6y(y-x)^2
=3x(x-y)^3-6y(x-y)^2
=(x-y)²[3x(x-y)-6y]
=3(x-y)²(x²-xy-2y)
If it's simplification, remove the brackets:
3(x-y)²(x²-xy-2y)
=3(x²-2xy+y²)(x²-xy-2y)
=3(x^4-x^3y-2x²y-2x^3y+2x²y²+4xy²+x²y²-xy^3-2y^3)
=3(x^4-3x^3y-2x²y+3x²y²+4xy²-xy^3-2y^3)
=3x^4-9x^3y-6x²y+9x²y²+12xy²-3xy^3-6y^3

X+Y=60 0.3X+0.6Y=.01*160
A

x=344/3
y=-(164/3)

A story book, Xiaoxiao read one seventh of the whole book on the first day, one eighth of the whole book on the second day, and four pages less than the first day. How many pages are there in this book?

224.(1/8)x -(1/7)x =-4

Xiao Hong read a story book. On the first day she read one eighth of the whole book, and on the second day she read the remaining one seventh. How many pages did she read in two days

If there is 8 / 7 left after reading 8 / 1, you will read 8 / 7 * 7 / 1 = 8 / 1 the next day, and read 8 / 1 + 8 / 1 = 4 / 1 in two days
If there is no specific number of pages or other conditions, no specific number of pages can be found

Chicken and rabbit have 100 feet in total. If chicken is replaced by rabbit and rabbit is replaced by chicken, there will be 86 feet in total?

There are x chickens, X rabbits, and (100-2x) rabbits (100-2x) and (100-2x) 4, and the meaning of the title is: 4x + (100-2x) (100-2x) - 4 × 2 = 86, and & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; and the & nbsp; & nbsp; 4x + (100-2x) (100-2x) and the idea: 4x + (100-2x) (100-2x) (4-2x) (4-4 × 2 = 4 × 2 = 86, 4 × 2 = 86, & amp & nbsp; & nbsp; & nbsp; & & nbsp; & nbsp; & nbsp; & & nbsp; & nbsp; & & nbsp; & & nbsp; & & nbsp; & nbsp; & nbsp; & & nbsp; & & nbsp; & nbsp; & & nbsp; & nbsp; & nbsp; & & nbsp; & nbsp; & nbsp; & nbsp; & & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; &Nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 36 △ 3, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 12, then rabbits have: (100-2 × 12) △ 4 = 19. Answer: there are 12 chickens and 19 rabbits

Chicken and rabbit have 100 feet in total. If chicken is replaced by rabbit and rabbit is replaced by chicken, there will be 86 feet in total?

Suppose that there are x chickens and (100-2x) × 4 rabbits, the meaning of the question is as follows: 4x + (100-2x) × 4 × 2 = 86, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 4x + 50-x = 86, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp

There are several chickens and rabbits in the cage. It is known that there are 28 heads and 86 legs. How many chickens and rabbits are there?

Suppose all rabbits, then chickens have: (28 × 4-86) △ 4-2, = 26 △ 2, = 13 (rabbits), so rabbits have: 28-13 = 15 (rabbits), answer: there are 13 chickens and 15 rabbits

There are several chickens and rabbits in the cage. It is known that there are 28 heads and 86 legs. How many chickens and rabbits are there?

Suppose all rabbits, then chickens have: (28 × 4-86) △ 4-2, = 26 △ 2, = 13 (rabbits), so rabbits have: 28-13 = 15 (rabbits), answer: there are 13 chickens and 15 rabbits

There are several chickens and rabbits in the cage, with 28 heads and 86 feet. How many chickens and rabbits are there?
Quick... I have to pay tomorrow, only 10 reward, I'm a novice, not enough. Quick... The equation

There were x chickens and 28-x rabbits
2x+4(28-x)=86
2x+112-4x=86
-2x=86-112
2x=26
x=13
That is: 13 chickens, 28-13 rabbits = 15

There are several chickens and rabbits in the cage. It is known that there are 28 heads and 86 legs. How many chickens and rabbits are there?

Suppose all rabbits, then chickens have: (28 × 4-86) △ 4-2, = 26 △ 2, = 13 (rabbits), so rabbits have: 28-13 = 15 (rabbits), answer: there are 13 chickens and 15 rabbits