Solving equation (x-1) (X-2) = 6 by factorization

Solving equation (x-1) (X-2) = 6 by factorization

( x - 1 )( x - 2 ) = 6
x" - x - 2x + 2 = 6
x" - 3x - 4 = 0
x" + x - 4x - 4 = 0
x( x + 1 ) - 4( x + 1 ) = 0
( x + 1 )( x - 4 ) = 0
How to solve the equation
x1 = -1,
x2 = 4

4X to the second power + 20x + 25, please. This is factorization

4X to the second power + 20x + 25
=（2x+5）²
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Solving equation 4x ^ 2-20x + 25 = 7 by factorization

4X & # 178; - 20x + 25 = 7 the left side of the equation is the complete square, factoring
(2x-5) & # = 7 root
2x-5=±√7
2x-5 = √ 7 or 2x-5 = - √ 7
x1=(5+√7)/2
x2=(5-√7)/2

How to solve 4x ^ 2-20x + 18 by factorization

4x^2-20x+18
=（2x-2)(2x-9)

When judging the continuity of partial derivative, should we treat it as a function of one variable or a function of two variables?

The partial derivative can be treated as one variable, and the continuity must be treated as two variables

What is the number of square itself? What is the number of cube itself? What is the number of square its opposite number? What is the number of cube its opposite number?

The number of square itself is 0, 1
The number of the cube itself is - 1, 0, 1
The opposite number of square is - 1, 0
The opposite number of a cube is 0

8 = 2001 divide brackets by addition, subtraction, multiplication

(88+88+8)/8*(88-8/8)=2001

It is known that the images of two linear functions y = 4x + A and y = 3x-b intersect at the same point on the x-axis, then the value of a / B is () a.1 B. - 1 C. - 4 / 3 D.3 / 4

X-axis then y = 0
So when y = 0, X is equal
4x+a=0
x=-a/4
3x-b=0
x=b/3
So - A / 4 = B / 3
a/b=-4/3
Choose C

There is a circular fountain in the street park, with a diameter of 12 meters. There is a 3-meter-wide cement road around the fountain. How many square meters is the area of this cement road?

π(6+3)-π×6=81π-36π =45π

5. How do 6, 7, 8 count as 24 o'clock

1: (5 + 7 - 8) × 6
2: ((5 + 7) - 8) × 6
3: (5 + (7 - 8)) × 6
4: (5 + 7) × (8 - 6)
5: (5 - 8 + 7) × 6
6: ((5 - 8) + 7) × 6
7: (5 - (8 - 7)) × 6
8: 6 × (5 + 7 - 8)
9: 6 × ((5 + 7) - 8)
10: 6 × (5 + (7 - 8))
11: 6 × (5 - 8 + 7)
12: 6 × ((5 - 8) + 7)
13: 6 × (5 - (8 - 7))
14: 6 × (7 + 5 - 8)
15: 6 × ((7 + 5) - 8)
16: 6 × (7 + (5 - 8))
17: (6 ÷ (7 - 5)) × 8
18: 6 ÷ (7 - 5) × 8
19: 6 ÷ ((7 - 5) ÷ 8)
20: 6 × (7 - 8 + 5)
21: 6 × ((7 - 8) + 5)
22: 6 × (7 - (8 - 5))
23: 6 × (8 ÷ (7 - 5))
24: 6 × 8 ÷(7 - 5)
25: (6 × 8) ÷ (7 - 5)
26: (7 + 5 - 8) × 6
27: ((7 + 5) - 8) × 6
28: (7 + (5 - 8)) × 6
29: (7 + 5) × (8 - 6)
30: (7 - 8 + 5) × 6
31: ((7 - 8) + 5) × 6
32: (7 - (8 - 5)) × 6
33: (8 - 6) × (5 + 7)
34: (8 - 6) × (7 + 5)
35: 8 × (6 ÷ (7 - 5))
36: 8 × 6 ÷(7 - 5)
37: (8 × 6) ÷ (7 - 5)
38: (8 ÷ (7 - 5)) × 6
39: 8 ÷ (7 - 5) × 6
40: 8 ÷ ((7 - 5) ÷ 6)