[求助]GWD29-30

ilovecushi

Q30:

What is the value of (2x – 5)³ ?

(1)       (2x)³ = 216

(2)       (2x + 3)² = 81

                  

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

答桊是E 给矇对了
但不懂围什麽

emilyer720

答案是A吧

(2x)³= 6³
                

2x= 6

帶入題目給的式子就可以解了

(2x + 3)² = 9² or (-9)²

值不固定

YiYaYiYaYou

妹妹你蹭啥呢？