16 and 28

16 and 28

16=2×2×2×2
28=2×2×7
The greatest common factor of 16 and 28 is 2 × 2 = 4
The least common multiple of 16 and 28 is 2 × 2 × 2 × 2 × 7 = 112

The number divisible by 2.5 is the factorization prime factor 28 of 16 factorization prime factor 30 factorization prime factor

16=2×8=2×2×2×2
28=4×7=2×2×7
30=5×6=2×3×5
What's in the math exercise book

The polynomial x ^ 2-my ^ 2 can be factorized by the square difference formula, then M =?

M is a positive number
(M is a positive complete square without a radical sign)

Calculation with square difference formula: (& sup2; = square, & SUP4; = fourth power)
①2(3+1)(3²+1)(3&sup4;+1)(3&sup8;+1)+1
②½（1+½）（1+¼）（1+1/16)(1+1/256）
③（2+1)(2²+1)(2&sup4;+1)(2&sup8;+1)(2¹6;+1)

①
2(3+1)(3^2+1)(3^4+1)(3^8+1)+1
= (3-1)(3+1)(3^2+1)(3^4+1)(3^8+1） + 1
= (3^2-1)(3^2+1)(3^4+1)(3^8+1) + 1
= (3^4-1)(3^4+1)(3^8+1) + 1
= (3^8-1)(3^8+1) + 1
= 3^16 - 1 + 1
= 3^16
②1/2 *（1+1/2）（1+1/4）（1+1/16)(1+1/256）
= (1-1/2)（1+1/2）（1+1/4）（1+1/16)(1+1/256）
= (1-1/4)（1+1/4）（1+1/16)(1+1/256）
= (1--1/16）（1+1/16)(1+1/256）
= (1-1/256)(1+1/256）
= 1-1/(256*256)
= 65535/65536
③（2+1)(2^2+1)(2^4+1)(2^8+1)(2^16+1)
= (2-1) （2+1)(2^2+1)(2^4+1)(2^8+1)(2^16+1)/(2-1)
= ……
= 2^32 -1

In the polynomial m squared + n squared, - A-B squared, X squared + 4Y squared, - 4S squared + 9t squared, we can use the square difference formula to decompose the factor
Yes_____________________ The result is_______________________ ;

M & # 178; + n & # 178;, cannot be decomposed
X ^ 4 + y ^ 4 cannot be decomposed
-4S & # 178; + 9t ^ 4 can be decomposed
=(3t²-2s)(3t²+2s)

If the polynomial ax2-ax-2a is factorized, the following result is correct ()
A. a（x-2）（x+1）B. a（x+2）（x-1）C. a（x-1）2D. （ax-2）（ax+1）

Ax2-ax-2a, = a (x2-x-2), = a (X-2) (x + 1)

If the quadratic trinomial X & sup2; + 4ax + A & sup2; + 12 is a complete square formula, find the value of A

16a²-4(a²+12)=0
12a²-48=0
a²=4
a=±2

36x & sup2; - MXY + 49y & sup2; is a complete square formula, then the value of M is

It is (6x ± 7Y) & 178;
=36x²±84xy+49y²
So - M = ± 84
m=-84,m=84

If 49y & sup2; - My + 36 is a complete square formula, then the value of M is?

49y²－my＋36
=(7y±6)^2
=49y^2±84y+36
m=±84

630 square meters is equal to how many mu, ask big God to help

630 square meters = 0.945 mu, hope to adopt, thank you!