BÀI 1( 2® ) A, T×M X BIÕT

15, - DE THI GIAITOAN TREM MTCT CO DAP AN
DE THI GIAITOAN TREM MTCT CO DAP AN

15, 25

0,125.2

3, 567. 1

1

.1

5

4

5

11

3

7

11

46

 

0, (2)x

2, 007

9, 2

0, 7 5, 65 3, 25

    B x y x 5xy x 5xy   

b, (x 5y)(x 5y)

2

2

5x y

2

5x y

2

     Với x = 0,987654321; y = 0,123456789 Kết qủa a, b,