Given that f is an even function, G is an odd function, and F-G = the square of x-x = 2, find the expression of F and G

Given that f is an even function, G is an odd function, and F-G = the square of x-x = 2, find the expression of F and G

1, the square of X - x = 2
X (x-1) = 2, so x can only be equal to 2 or - 1
2, if x = 2
f=X*X
g=X
That is x * x-x = 2
3, if x = - 1
f=X
g=-X
That is, X - (- x) = 1
But because f is an even function, f = x does not hold
The results are as follows
f=X*X
g=X

A very simple calculation problem of binary linear equations
1-0.3(y-2)=0.2(x+1)
0.1y-0.3/0.4=0.4x+0.9/2-1.5
This is a system of equations, I calculated, but the total answer is not the same
But that's not the answer
The answer is x = 4, y = 2

1-0.3 (Y-2) = 0.2 (x + 1) ① 0.1y-0.3/0.4 = 0.4x + 0.9/2-15 ② multiply both ① and ② by 1010-3 (Y-2) = 2 (x + 1) ① y-7.5 = 4x + 4.5-15 ② that is, 2x + 3Y = 14 ① 4x-y = 3 ② ① * 24x + 6y = 28 ③ - 27y = 25y = 25 / 7 substitute y = 25 / 7 into ② 4x-25 / 7 = 3x = 23 / 6

Seeking analysis
A class of 60 people, 42 people can swim, 46 people can ride, 50 people can skate, 55 people can table tennis, at least how many people can do four events,

Number of people who can't swim. 60-42 = 18 (people)
60-46 = 14 (people)
Number of people who can't skate. 60-50 = 10 (people)
Number of people who can't play table tennis. 60-55 = 5 (people)
There are 47 people who can't do one thing. 18 + 14 + 10 + 5 = 47
The number of people in at least four cities. 60-47 = 13

44 / 45 * 37 =? Simple calculation

44/45*37=（45-1）/45*37=（1-1/45）*37=37-37/45

After addition and subtraction of different denominator fractions, can the denominator be calculated
For example, if the result of addition and subtraction of two different denominators is 3A / (3a + 1) ^ 2, can the denominator (3a + 1) ^ 2 be written as 9A ^ 2 + 6A + 1

In principle, it must be calculated out, but in recent years, in the senior high school entrance examination, we have to deduct points for errors, but we haven't expanded them to full points, so we don't emphasize the need to expand them in teaching. We mainly decide whether to divide them according to the specific requirements of teachers

How does 9 8 7 6 5 4 3 1 Equal 1000?
9 8 7 6 5 4 3 1 =1000
You can use +, -, x, division, (,) to make it equal to 1000,
There must be an operation symbol between each number, and a number cannot be omitted.

987+6+5+4÷(3-1)=1000
987+6+5+4-3+1=1000

What is 24 * (8 / 3-6 / 1) equal to

24 × (8 / 3-6 / 1) = 24 × 8 / 3-24 × 6 = 64-144 = - 80 6 / 1 wrong?

English translation
Do you need to use the future perfect tense?

You return the book to me by next week
Return the book back to me before next week
It is not necessary to use the future perfect tense

What is the calculation method of normal year and leap year

Divide the year by 4, the leap year is divisible and the flat year is divisible
For example, in 2011, 2011 △ 4 = 502.75, the average year
For example, in 2012, 2012 △ 4 = 503, leap year

What is 2.5 times the square of 10 times 2.5 times 2.5 times the square of 10

2.5*10^2*2.5*2.5*10^2
Is that the question?
It's 1.5625 * 10 ^ 5