Dễ:

5km2 37dam2=5,0037km2

TL

5km2 37dam2=5,0037km2

HT Ạ

@@@@@@@@@@

5,0037 km2

đau lx r 

m² -8m -16 =0

m² -2.4m -4\(^2\) =0

(m - 4)\(^2\) = 0

=> m -4 = 0

=> m = 4

HT

m² - 8m - 16 = 0 <=> m² - 8m + 16 - 32 = 0

<=> ( m - 4 )² - ( 4√2 )² = 0 <=> ( m - 4 - 4√2 )( m - 4 + 4√2 ) = 0

<=> m = 4 ± 4√2

Pt này k dùng hằng đẳng thức được nhá:))

a²-2ab+b² =(a-b)²

5x-x-13=27

5x-1x=27+13

5x-1x=40

x.(5-1)=40

x.4=40

x=40:4

x=10

1 How was the lost man found by the police?

2 It was declared that she had won the competition

3 Has the window of the laboratory been changed?

4 Peter asked Janet if he could borrow her typwriter

5 My grandmother told me to feed her dog while she was away

6 My younger sister told me to lend her some more money

7 If I were tall enough,I would join the basketball team

8 If we don't hurry up, we will be late for the exam

9 If he hadn't gone out late last night, he wouldn't have been punished

10 I wish the weather hadn't been bad yesterday

Câu 2 : 

a) Số giao tử đực tạo thành sau giảm phân : \(5.4=20\left(tb\right)\)

b) Số giao tử cái tạo thành sau giảm phân :  \(10.1=10\left(tb\right)\)

Ta có:   A= x^3 + y^3 + xy

               =  (x+y)(x^2 - xy + y^2) + xy

               =  x^2 - xy + y^2 + xy

               = x^2 + y^2 >= 0  

         Vậy MinA=0 khi x=0 và y=0