TÌM X BIẾT A, |X+15|−4=−2 B, (2X −1)2=81 C, (3X −2)(7X −15)=0 D, 2X+5X −3<0

bài 2 - DE THI TOAN
Toán DE THI TOAN

Bài 2(2,0đ): Tìm x biết

a, |

x+15

|

−4=−2

b,

(2x −1)

2

=81

c,

(3x −2)

(

7x −15

)

=0

d,

2x+5x −3<0