Let a = 2x square - 3x + 2, B = x square - 4 and a + B-C = 0 If we know the square of a = 2x - 3x + 2, B = the square of X - 4 and a + B-C = 0, we can find the quick handle of C

Let a = 2x square - 3x + 2, B = x square - 4 and a + B-C = 0 If we know the square of a = 2x - 3x + 2, B = the square of X - 4 and a + B-C = 0, we can find the quick handle of C

A+B-C=0 C=A+B =2x-3x+2+x-4 =3x-3x-2

How much is the power of (- 2) 201 - (- 2) 200
process
reason
Write it out
Solve!

=（-2）200x(-2)-(-2)200
=(-2)200(-2-1)
=-3x-2(200)
=-3x(2(200)
Because the even power of a negative number is a positive number

What is the 200 th power of 2 minus 201 th power of 2
The first part must be - (2 ^ 200-2 ^ 201)

＝（2^200—2^201）
=2^200-2×2^200 =(1-2)×2^200 =-2^200

What is the 200 th power of 2 minus 201 th power of 2

200 power of 2 minus 201 power of 2
=2^200-2×2^200
=(1-2)×2^200
=-2^200

If there are five Fridays, Saturdays and Sundays in March, what day is March 1st?
March has 31 days

In any 31 day big month, there are three weeks worth five days. These three weeks must be continuous. They are on the first, second and third of the month. This is because the big month has 31 days. The week is seven days a week. In 28 days, there are four complete weeks. The week on the 29th repeats the week value on the 1st, the 30th is the 2nd, and the 31st is the 3rd

（101+103+… +199）-（90+92+… +188）=______ ．

Solution 1: 101 + 103 + +199）-（90+92+… +188) = (101 + 199) × [(199-101) △ 2 + 1] / 2 - (90 + 188) × [(188-90) △ 2 + 1] / 2, = 300 × 50 △ 2-278 × 50 △ 2, = (300-278) × 25, = 22 × 25, = 550 +199）-（90+92+… +188）=（101-90）+（103-92）+… +(199-188) = 11 × (199 − 1012 + 1) = 11 × 50 = 550, so the answer is: 550

How to calculate the opposite number of A-B and how to calculate the opposite number of 2x + Y-Z_____ (have) a rest

1. The opposite number of A-B
=-（a-b）
=-a+b
2. The opposite number of 2x + Y-Z
=-（2x+y-z）
=-2x-y+z
3、I need _____ (have) a rest
This is the infinitive of the verb

The relationship between histogram frequency and frequency

In the frequency distribution diagram, the rectangular area represents the frequency. The frequency is given to the total number of samples and multiplied by the frequency is equal to the frequency. In a word, frequency = frequency / total number of samples

The number of male students is 25% more than that of female students. The number of male students is 125% of that of female students

There are 25% more boys than girls and 125% more boys than girls
(number of girls) multiplied by 25% equals (how many more boys than girls)
(number of girls) multiplied by (1 + 25%) equals (number of boys)

The mathematical relation x ≤ y ≤ Z can be expressed in C language (c)
A) x

x