What is the greatest common factor of 15 and 20______ The least common multiple is______ .

What is the greatest common factor of 15 and 20______ The least common multiple is______ .

15 = 3 × 5, 20 = 2 × 2 × 5, so the greatest common factor of 15 and 20 is 5, and the least common multiple is 2 × 2 × 3 × 5 = 60
What are the greatest common factor and the least common multiple of 12, 15 and 30
The greatest common factor is 3 and the least common multiple is 60
60 3
There is any bread here, is is singular and any is plural,
Is there any bread here?
Some is used to express some in declarative sentences. It can modify both countable nouns and uncountable nouns. If you want to become a question, then some should be replaced by any
Let there be a complex Z satisfying the following conditions: (1) the corresponding point of complex Z in the complex plane is in the second quadrant; (2) Z · Z + 2iz = 8 + AI (a ∈ R)
Let z = m + Ni (m ＜ 0, n ＞ 0) from (1), then from (2), | Z | 2 + 2I (M + Ni) = 8 + AI, that is M2 + n2-2n + 2mi = 8 + AI, ｜ M2 + N2 − 2n = 8 & nbsp; a = 2m & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; ② From (1), we get that: M2 + (n-1) 2 = 9, the point Z corresponding to the complex Z is the part of the circle M2 + (n-1) 2 = 9 in the second quadrant, then - 6 ≤ 2m < 0
Is this his teacher
Are these their teachers?
Are they his teachers?
It is known that the equation x ^ 2 - (6 + I) x + 9 + AI = 0 about X has real number root B. find the value of real numbers a and B
b^2-(6+i)b+9+ai=0
(b ^ 2-6b + 9) + (- B + a) I = 0
So B ^ 2-6b + 9 = 0 - B + a = 0
We get a = b = 3
Substitute B into the equation to make the real part and imaginary part zero respectively!
This is woman teacher
These are women teachers
These are women teachers.
It is known that the equation x ^ 2 - (6 + I) x + 9 + AI = 0 (a belongs to R) has real number root B, and the value of real number A.B is obtained
x²-(6+i)x+9+ai=0
x²-6x+9+(a-x)i=0
(x-3)²+(a-x)i=0
x-3=0 x=3 b=3
a-x=0 a=3
a=3 b=3
x²-(6+i)x+9+ai=0
x²-6x+9+(a-x)i=0
(x-3)²+(a-x)i=0
There is a real root B
(b-3)²+(a-b)i=0
B-3 = 0 leads to B = 3
If A-B = 0, then a = 3
So a = 3, B = 3
Are plural nouns the same as uncountable nouns?
Water, air, rain are not plural, but they are not plural (most of them are plural), but they are countable
Same~~~~~~~
dissimilarity
For example, collective nouns
If the real number B is the root of the equation, x 2 - (6 + I) x + 9 + AI = 0 (a belongs to R), find the value of a + B
Because B is the root of the equation, so substituting it into the equation, the equation holds
That is: B ^ 2 + (6 + I) B + 9 + AI = 0
So: (B + 3) ^ 2 + (a + b) I = 0
To make a complex number equal to 0, its real part and imaginary part must be 0
So a + B = 0