Factorization of X (x + 1) (x + 2) (x + 3) - 15 How to factorize x (x + 1) (x + 2) (x + 3) - 15 If it's right, I'll add it 2L, factorization is not integral multiplication!

Factorization of X (x + 1) (x + 2) (x + 3) - 15 How to factorize x (x + 1) (x + 2) (x + 3) - 15 If it's right, I'll add it 2L, factorization is not integral multiplication!

Original formula = [x (x + 3)] [(x + 1) (x + 2)] - 15 = (x ^ 2 + 3x) (x ^ 2 + 3x + 2) - 15 = (x ^ 2 + 3x) ^ 2 + 2 (x ^ 2 + 3x) - 15 = (x ^ 2 + 3x + 5) (x ^ 2 + 3x-3)

x^15+x^14+x^13+x^12…… +Factorization of x ^ 2 + X + 1

Original formula = (x-1) (x ^ 15 + x ^ 14 +...) +1)/(x-1)
=(x^16-1)/(x-1)
=(x^8+1)(x^4+1)(x²+1)(x+1)(x-1)/(x-1)
=(x^8+1)(x^4+1)(x²+1)(x+1)

x-0.8x=22
The best answer is: X-1 / 4x = 3 / 8

.(1-0.8)X=22
0.2X=22
X=22/0.2
X=110
Do the same as the next question
(1-1/4)X=3/8
3/4X=3/8
X=1/2
To be honest, I have a feeling of being played

The real numbers a and B on the number axis are shown in the figure, which are simplified as follows: √ (a + 1) & # 178; - √ (b-2) & # 178; - √ (a-b) & # 178;
Figure: --- --- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-4 -3 -2 a -1 0 1 2 b 3

How many steps does 3x of 4 minus 1 of 4 = 11 of 12 + 1 of 5 get: how to calculate

3/4X-1/4=11/12+1/5x
3/4x-1/5x=11/12+1/4
15/20X-4/20x=11/12+3/12
11/20x=14/12
11/20X=7/6
X=7/6*20/11
X=140/66=70/33

What are the properties of positive definite matrix

1. Definition because positive definite quadratic form is closely related to positive definite matrix, let's define positive definite quadratic form before defining positive definite matrix: if there is a quadratic form, f (x) > 0 (0) for any x 0, then f (x) is called positive definite (semi positive definite) quadratic form

A1 = 1, A2 = 2, when n ″ = 3, there is an = an-1 + An-2. It is proved that the limit of one part of an exists and the limit is obtained

As for the limit, you can consider proving that there is a Changshu C such that an + C * an-1 is an equal ratio sequence, then you can get the general term of an, and the limit can be obtained naturally

4X 10 24 2 6x 1 4

14

The definition field of function f (x) is R. every X1 and X2 in the definition field has f (x1 + x2) = f (x1) + F (x2). When x is greater than 0, f (x) > 0, it is proved that f (x) is an odd function

Let X1 = x2 = 0, then f + F = f so f = 0, and X1 = - x2 has F + F = o so f = - F, and the domain of definition is r, so it is an odd function

Which of the following intervals is y = cos2x a decreasing function

0, Pai / 2