(2x ^ 3-x + 6) times (3x ^ 2 + 5x-2) =?,,,, calculated by vertical formula?

(2x ^ 3-x + 6) times (3x ^ 2 + 5x-2) =?,,,, calculated by vertical formula?

(2x ^ 3-x + 6) times (3x ^ 2 + 5x-2)
=6x^5+10x^4-4x^3-3x^3-5x^2+2x+18x^2+30x-12
=6x^5+10x^4-7x^3+13x^2+32x-12

How to calculate (x-1) (X-2) (x-3) (x-4) - (x ^ 2-5x) ^ 2-10 (x ^ 2-5x)?

(x-1)(x-2)(x-3)(x-4)-(x^2-5x)^2-10(x^2-5x) ＝[(x-1)(x-4)(x-2)(x-3)]-(x^2-5x)^2-10(x^2-5x) =(x^2-5x+4)(x^2-5x+6)-(x^2-5x)^2-10(x^2-5x) ==[(x^2-5x)+4][(x^2-5x)+6]-(x^2-5x)^2-10(x^2-5x) =(x^2-5x)^2+10(x^...

40 + 20% x = 4x / 5 + 120 × 1 / 4
solve equations

40 + 20% x = 4x / 5 + 120 × 1 / 4
40 + 5 x = 5 x + 30
4x-5x = 40-30
3 out of 5 x = 10
X = 50 / 3
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2 / 4x-3-1 = 5 / x + 1
(2) First, simplify, and then evaluate: 2 (- x + 3Y) - 3 (x + y) + 4 (x-2y), where x = 2, y = 7

-2X+6Y-3X-3y+4x-8y
=-x-2y
=-2-14
=-16

There are five non-zero rational numbers a, B, C, D and E. A-B > 0, AB < 0, ABC > 0, CD > 0 and de > 0 are known. Please judge the positive and negative of the five rational numbers

If A-B > 0, then a > b
AB < 0 indicates that a and B are different
So a > 0 B

It is known that the sequence {an} with the first term of a is both an arithmetic sequence and an isobaric sequence, then the first n terms and Sn of the sequence are Na and? Why

Take the first three terms to list the equation
a1=a
a2=a+d=aq
a3=a+2d=aq^2
The solution can only be q = 1, d = 0 (q = 0, rounding off)
So Sn = Na

The domain of two different functions f (x) = x2 + ax + 1 and G (x) = x2 + X + a (a is a constant) is R. if the range of F (x) and G (x) is the same, then a=___ .

The same range indicates that they are translational
That is, f (x + m) = g (x)
(x+m)²+a(x+m)+1=x²+x+a
x²+(2m+a)x+(m²+am+1)=x²+x+a
Corresponding equivalence: ① 2m + a = 1, ② M & sup2; + am + 1 = a
Take ① into ②, M & sup2; + am + (2m + a) = a, i.e. M & sup2; + am + 2m = 0, i.e. m (M + A + 2) = 0
When m = 0, we can know a = 1 from 1
When m ≠ 0, M + A + 2 = 0, and a = - 5
To sum up: a = - 5, or a = 1

Two points a and B on the number axis represent real numbers [3 root sign 2] and 4, respectively
(1) Please judge the position between a and B, that is, is point a on the left or right of point B?
(2) Calculate the distance between two points a and B (accurate to 0.01)
A cube with a volume of 343cm to the third power was sawn into eight small cubes with the same size
Especially+
Urgent!

Point a is 0.24 to the right of point B
343cm / 8 = 171.5

( )+( )=163 ( )—( )=19

X=91 Y=72

The volume of a basketball is 9850 cubic centimeters, and the radius of the basketball is R. [the circumference is 3.14, and the result is accurate to 0.1cm]

The volume of the sphere = 4 / 3 × the circumference × the cube of the radius of the circle
Pi = 3.14
Cube of radius = 9850 / 3.14 / 4 × 3 = 2353
Radius = 13.3
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