Simplify a (5-3a) + 1-A & sup2; (4a-3) 5 {XY (x-2y) + Z} - 4 {2Z + XY (3x-y)} Simplify a (5-3a) + 1-A & sup2; (4a-3) 5 {XY (x-2y) + Z} - 4 {2Z + XY (3x-y)}

Simplify a (5-3a) + 1-A & sup2; (4a-3) 5 {XY (x-2y) + Z} - 4 {2Z + XY (3x-y)} Simplify a (5-3a) + 1-A & sup2; (4a-3) 5 {XY (x-2y) + Z} - 4 {2Z + XY (3x-y)}

A (5-3a) + 1-a2 (4a-3) = 5a-3a 2 + 1-4a * A2 + 3A 2 = - 4a (cubic) + 5A + 1
5{xy(x-2y)+z}-4{2z+xy(3x-y)} =5x 2y-10xy 2+5z-8z-15x 2y+5xy 2
=-10x 2y-5xy 2-10xy 2-3z
=-5xy(2x+y+2y)-3z

If x ^ n = 2, y ^ n = 3, then 1. (XY) ^ 3N (3x ^ 3n) ^ 2 + 4 (x ^ 2) ^ 2n
1 .(xy)^3n 2.(3x^3n)^2+4(x^2)^2n

(xy)^3n
=[(xy)^n]^3
=(x^n*y^n)^3
=(2*3)^3
=6^3
=216
(3x^3n)^2+4(x^2)^2n
=9x^6n+4x^4n
=9*(x^n)^6+4*(x^n)^4
=9*2^6+4*2^4
=9*8+4*16
=72+64
=136

a> 2, 4a-3x > - 1, what is x

a>2 ,4a-3x>-1,
3x

Calculation 4b-b =, 3x + x =, 9a-4a=

4B-B=3B,3X+X=4X,9A-4A=5A

The constant term in the polynomial 3x-1 / 4 is
A、1
B、-1
C、1/4
D、-1/4
Explain why!

The constant term in the polynomial 3x-1 / 4 is - 1 / 4
Choose D

In polynomial (3x ^ 2Y ^ 2-4) / 6, the constant term is ()

In polynomial (3x ^ 2Y ^ 2-4) / 6, the constant term is (- 2 / 3)

The constant term of the polynomial 3x-2x + π + 1 is——————————
A.3 B.1 C .+1 D.-2

Choose C π + 1
The constant term of the polynomial 3x-2x + π + 1 is (π + 1)

(3x + 5Y) ^ 2 - (3x-5y) ^ 2 is fast with the complete square difference formula

Original formula = (3x + 5y-3x + 5Y) (3x + 5Y + 3x-5y)
=10y×6x
=60xy

If | - a | = - A, then ()
A. - a must be negative B. - a must be non negative C. | a | must be positive D. - | a | must not be zero

The analysis shows that when a must be non negative, there are two possibilities: ① - A is positive, a must be negative, | - a | = - A, such as - (- 2) is positive, | - 2 | = - (- 2). ② - A is 0, the absolute value of 0 is still 0, | - 0 | = - 0, | - a | = - A; so select: B

The absolute value of a is nonnegative
It is expressed by inequality

Since | a | ≥ 0