Grade 5 Volume 2 Chinese unit 2 composition look at the picture write words 400

Grade 5 Volume 2 Chinese unit 2 composition look at the picture write words 400

Unit 2, Volume 2, grade 5. Look at the picture and write. Don't copy what you write

After school, at the suggestion of classmate Tai Rui, several "World Cup fans" in the class are going to have a football match in the garden. Yang Zhe, the classmate who takes the football, is so late that everyone is as anxious as ants in a hot pot. The football is here. After we are divided into teams a and B, a wonderful and fierce football match begins

Solve quadratic equation with one variable. (1) 2x ^ 2 + 6 = 7x (2) (2-x) ^ 2 + x ^ 2 = 4

2X^2+6=7X
2X^2-7x+6=0
(2x-3)(x-2)=0
x=1.5 x=2
（2－X）^2+X^2=4
X^2-4x+4+X^2=4
2X^2-4x=0
2X(x-2)=0
x=0 x=2

3 / x + X-12 / 4x, online, etc
Trouble has a process

Is it 12 / 4x or (12 / 4) * x? If it is 12 / 4x = 3 / x + x-3 / x = x

Solve the equation as follows: X / 7 / 2x 4 / 3 = 12
X / 7 / 2x 4 / 3

7x/2*3/4=1221x/8=12x=12*8/21x=32/7

What is order reduction method in determinant of linear algebra

The order reduction method is to reduce the order of determinant by expansion theorem

What is the value of the fraction (7x & sup2; -- y & sup2;) \ (X & sup2; -- 2XY + 3Y & sup2;) if x / 2 = Y / 3?

Let k = X-2 = Y-3
Then x = 2K, y = 3K
So (7x & sup2; -- y & sup2;) \ (X & sup2; -- 2XY + 3Y & sup2;)
=(28k²-9k²)/(4k²-12k²+27k²)
=19k²/(19k²)
=1

If | x-3 | and | y + 2 | are opposite to each other, find the value of X + y + 3______

Because | x-3 | and | y + 2 | are opposite numbers, so | x-3 | + | y + 2 | = 0, so | x-3 | = 0, | y + 2 | = 0, that is, x-3 = 0, y + 2 = 0, so x = 3, y = - 2. So x + y + 3 = 3 + (- 2) + 3 = 4

Calculation: (1) (- 4x ^ 2-3y ^ 3) (12x ^ 2-9y ^ 3)

The original formula = - 48x fourth power + 39x square y three power - 36x square y three power + 27y nine power. The middle two terms should be combined

If 2n power of a = 6, then 4N power of a = ()

The fourth power of a
=The square of (2n power of a)
=Square of 6
=36