X square root 2 times x + 0.5 = 0 A quadratic equation of one variable, I hope you can help me

X square root 2 times x + 0.5 = 0 A quadratic equation of one variable, I hope you can help me

X square root 2 times x + 0.5 = 0
x²-2*√2/2x+(√2/2)²=0
（x-√2/2）²=0
x=√2/2

If the square of cubic root 1 - a = the square of 1 - A, find the value of A

Square of cubic root sign 1-A = square of 1-A 1-A ^ 2 = (1-A ^ 2) ^ 3 (1-A ^ 2) ^ 3 - (1-A ^ 2) = 0 (1-A ^ 2) [(1-A ^ 2) ^ 2-1] = 0 (1-A) (1 + a) (1-A ^ 2 + 1) (1-A ^ 2-1) = 0 (1-A) (1 + a) (root sign 2-A) (root sign 2 + a) * (- A ^ 2) = 0a1 = 0a2 = + 1A3 = - 1A4 = root sign 2a5 = - root sign 2

The graduates of a school are divided into nine classes, and the number of students in each class is equal. It is known that the total number of boys in class one is 1 more than that of girls in class two and three; the total number of girls and students in class four, five and six is 1 more than that of boys in class seven, eight and nine. What is the ratio of boys and girls among the graduates of the school?

According to the question: the total number of girls in class 2.3.4.5.6 = the total number of boys in class 1.7.8.9, while the number of boys and girls in class 2.3.4.5.6 is the same as that in class 1.7.8.9, and there is one more class for boys than girls. Therefore, the ratio of boys to girls is 5:4

Which objects in life are about this long? 1.75 m 18.5 cm 0.27 decimeter

The length of a man is about 1.75 meters
The length of the book is about 18.5 cm (32 open)
The length of the eraser is about 0.27 decimeter = 2.7 cm

Who can tell me the beauty over a hundred years in Lesson 18 of Volume 2 of grade 6? Explain the key words and type them by yourself. The difficult ones (at least 10 words) can't be repeated

Radium: metallic element, symbol RA, silvery white, radioactive, which can be used to treat cancer and skin diseases in medicine

The least common multiple of 12 and 30 is ()
A. 12B. 30C. 60

Because 12 = 2 × 2 × 3, 30 = 2 × 3 × 5, the least common factor of 12 and 30 is 2 × 3 × 2 × 5 = 60

1. If 3.5 of x equals 7 of Y, and X and y are not equal to 0, then what is x multiplied by is equal to what is y multiplied by? 2, the solution ratio is 1, 1 of 6 is equal to 1 of 4 to 1 of 3

1.7x=3.5y
2.1/1.6 :x=1/4:12/3 x=(1/1.6) * (12/3) / (1/4)=10

If a, B and C are used to represent rational numbers, a, B, C and 0 are the origin

b>0,a

Is 0,0,0,0... A constant sequence? An arithmetic sequence? An arithmetic sequence?

Constant sequence: if each term of a sequence is an equal constant, that is, an = an + 1 (n ∈ n *), then the sequence {an} is "constant sequence", also known as "constant sequence" http://baike.baidu.com/link?url=BMpMmFR9Wzfkt17pcNV2Jx8XVY6W1WvB3LWRlrN-9KVBsLqgD_ qr7mMPoB76...

The maximum of function f (x) = (x-1) 2 (X-2) 2 is______ ．

∵ f (x) = (x-1) 2 (X-2) 2, ∵ f ′ (x) = 2 (x-1) (X-2) (2x-3); Let f ′ (x) = 0, the possible extreme points X1 = 1, X2 = 32, X3 = 2 are obtained. The list is as follows: & nbsp; X & nbsp; (- ∞, 1) & nbsp; 1 & nbsp; (1,32) & nbsp; 32 & nbsp; (32,2) & nbsp; 2 & nbsp; (2, + ∞) & nbsp; F ′ (x) - & nbsp; 0 + & nbsp; 0 - & nbsp; 0+  f（x） ↘ &Nbsp; minimum ↗ &Nbsp; maximum ↘ &Nbsp; minimum ↗ Therefore, the answer is 116