A, B, ⇔⇔|X+15|=22X −1=9⇔2X −1=−¿ 9X+1¿¿5=2¿⇔¿X+15=−2⇔¿¿¿2X=10¿⇔¿ 2X=−8...

bài 2: - DE THI TOAN
Toán DE THI TOAN

Bài 2: a, b,

⇔⇔

|

x+15

|

=22x −1=92x −1=−¿ 9x+1¿¿5=2¿⇔¿x+15=−22x=10¿

2x=−8¿x=5¿x=95x=−¿ 4x=−11

c,