1. 1. The square of m-3m + 2 - 4m-2n-1 > 2, - 3 3、- 5 2、 The sum of the three inner angles of a triangle is equal to 108 degrees. If the first angle in the triangle is equal to three times of the second angle, and the third angle is 15 degrees larger than the second angle, then "1" and "2" are the degrees of each other? Don't be too simple

1. 1. The square of m-3m + 2 - 4m-2n-1 > 2, - 3 3、- 5 2、 The sum of the three inner angles of a triangle is equal to 108 degrees. If the first angle in the triangle is equal to three times of the second angle, and the third angle is 15 degrees larger than the second angle, then "1" and "2" are the degrees of each other? Don't be too simple

1、 1, (M? - 3M + 2) - (4m-2n-1) = M2 - 7m + 2n + 32, (3x? 2 + 4x-1) - 3 (x? 2 + 3x) = - 5x-13, - 5 (x? - 3) - 2 (3x? 2) = - 11x? + 54, - (x? Y + 3xy-4) + 3 (x? Y-xy + 2) = 2x? Y-4xy + 105, [(11 / 2) x? 2

Merge similar items 2x ^ 2-3x ^ 2 + 4x ^ 2 5x-2y + 3x + 4Y

3x^2 8x+2y

3x - (3x + 4Y) + (4x + 2Y) remove brackets and merge similar items

3x-(3x+4y)+(4x+2y)
=3x -3x -4y +4x +2y
= 4x -2y
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(1) 3x-2y-5-4x + 1 / 2 y + 1 / 2 merge similar items (2) - 2 / 3 x squared y + 2XY squared + 1 / 2 YX squared - XY squared

3x-2y-5-4x+(1/2)y+(1/2)   =>   -x-(3/2)y-(9/2)
-(2 / 3) x square y + 2XY square + (1 / 2) YX square - XY square = > XY square - (1 / 6) x square y

Multiplication of monomials question 1: 3x (2x-5y) - 3Y (x + 2Y) question 2: (- 2x) 2 · (1 / 2-4 / 1 x)

3x（2x-5y）-3y（x+2y)
=6x²-15xy-3xy-6y²
=6x²-18xy-6y²
（-2x)²（1/2-x/4）
=4x²*(1/2-x/4)
=2x²-x³

In the formula x ^ 2-3x, 2 π x ^ 2Y, 1 / x, - 5, a, 0, the number of monomials is () A.3 B.4 C.5 D.6

The monomial is
2πx²y 1/x
A
So there are three
A
A single term must be a combination of numbers and letters

If (3x2y-2xy2) △ M = - 3x + 2Y, then the monomial m is () A. xy B. -xy C. x D. -y

According to the meaning of the title: (3x2y-2xy2) / (- 3x + 2Y) = - XY,
Then M = - XY
Therefore, B

Which of 0.02xy? Z are monomials? Is π - 1 of 2 monomials? Why?

-11 / 3, 0.02xy? Z is a single term
Pi - 1 is a binomial because it is a constant

If the difference between 5A ^ 4xb ^ 3 and - A ^ 2B ^ 2x + y is still a single term, the detailed procedure for finding the algebraic expression (3x + 2Y) - 5 (3x + 2Y) 2 is given

∵ the difference between 5A ^ 4xb ^ 3 and - A ^ 2B ^ 2x + y is still monomial
∴4x=2; x=1/2
3=2x+y; y=2
The algebraic formula (3x + 2Y) 2 - 5 (3x + 2Y) Ω = - 4 (3x + 2Y) Ω = - 4 (3 * 2 + 2 * 1 / 2) = - 4 * 7 = 28

-2X - {4x-2y - [3x - (2x + 1)] - 10}, where x = - 3, y = 2009

-2x-{4x-2y-[3x-(2x+1)]-10}
=-2x-{4x-2y-3x+2x+1-10}
=-2x-4x+2y+3x-2x-1+10
=-5x+2y+9
=-5*(-3)+2*2009+9
=4018+24
=4042