(- 2x ^ 2) ^ 3 + (- 4x ^ 3) - (2x) ^ 2 (0.5x) ^ 4

(- 2x ^ 2) ^ 3 + (- 4x ^ 3) - (2x) ^ 2 (0.5x) ^ 4

(-2x^2)^3+(-4x^3)^2-(2x)^2(0.5x)^4
=-8x^6+16x^6-4x^2*x^4/16
=8x^6-x^6/4
=31x^6/4

(- x? + 5 + 4x? + (- x? + 5x-4), where x = - 2

：(-x²+5+4x³)+(-x³+5x-4),
=-x²+5+4x³-x³+5x-4
=-x²+1+3x³+5x
Where x = - 2
Substitution
=-4 +1 - 24 - 10
= - 37

First, Xiaogang made a mathematical problem: known two polynomials a, B, where B is 4x? - 5x-6, try to find a + B He mistook "a + B" for "A-B", and the result is 10x-7x? 12. Can you get the correct answer to a + B? 2. (y) + 3x + 2x + 2x + 2x To the process, thank you

1. A + B = A-B + 2B = 10x-7x ^ 2 + 12 + 2 (4x ^ 2-5x-6) = 10x-7x ^ 2 + 12 + 8x ^ 2-10x-12 = x ^ 22

How many solutions do 3 [X-2 (x-a / 3)] = 4x and 3x + A / 12-1-5x / 8 = 1 have the same solution

3[X-2（X-A/3)]=4X
3x-6(x-A/3)=4x
3x-6x+2A=4x
7x=2A
A=7x/2
3X+A/12-1-5X/8=1
19x/8=2-A/12
Substituting a = 7x / 2 into
19x/8=2-7x/24
Multiply both sides by 24
57x=48-7x
64x=48
x=3/4
So their same solution is 3 / 4

Solution of equations (1) {3x + 2Y + Z = 7,2x + 3Y + 4Z = 3, x + 4Y + 6Z = 1

x=3y=-1z=0

(x + 2Y + Z) / 3 = (5x-y-3z) / 5 = (2x-3y + 4Z) / 2 = 3 to solve the equations

X=4
Y=2
Z=1

To solve the equations 5x−4y+4z＝13 2x+7y−3z＝19 3x+2y−z＝18 ．

5x − 4Y + 4Z = 13 ① 2x + 7Y − 3Z = 19; ② 3x + 2Y − z = 18; ③ × 3 - ②: 7x-y = 35; ① × 3 + ② × 4: 23x + 16y = 115; ⑤; ④ × 16 + ⑤: x = 5; substituting x = 5 for ④ gives: y = 0; substituting x = 5, y = 0; substituting x = 5, y = 0; ③: z = - 3

Solving equations 2x+3y−4z＝−7 x−4y 3＝2y+3z 2＝2

The original equations are rewritten as follows: 2x + 3Y − 4Z = − 7 ① x − 4y3 = 2 ② 2Y + 3z2 = 2 ③, x = 6 + 4Y is obtained from equation ②, and 11y-4z = - 19 is obtained by substitution ①, 2Y + 3Z = 4 ⑤ is obtained from ③, and 33y + 8y = - 57 + 16, y = - 1

Solving equations 2x+3y−4z＝−7 x−4y 3＝2y+3z 2＝2

The original equations are rewritten as follows: 2x + 3Y − 4Z = − 7 ① x − 4y3 = 2 ② 2Y + 3z2 = 2 ③, x = 6 + 4Y is obtained from equation ②, and 11y-4z = - 19 is obtained by substitution ①, 2Y + 3Z = 4 ⑤ is obtained from ③, and 33y + 8y = - 57 + 16, y = - 1

2X + 3y-4z = - 7, (x-4z) △ 3 = (2Y + 3Z) △ 2 = 2, find the value of X, y, Z

(x-4z) △ 3 = (2Y + 3Z) △ 2 = 2
X = 4Z + 6, y = 2-1.5z and 2x + 3y-4z = - 7
8z+12+6-4.5z-4z+7=0
If z = 50, then x = 206, y = - 73