Question

( 2x - 7 )² = 16 

ngay bây giờ nhá !

Answer 1

(2x-7)²=16=4²

suy ra 2x-7=4

        or 2x-7=-4

suy ra x=11/2

or x=3/2

Answer 2

Th1:

 2x-7=16

2x     = 23

x          =11,5

Th2:

2x-7   = -16

2x        = -9

x= -4,5

Answer 3

thank you !

Answer 4

  \(\left(2x-7\right)^2=16\)

\(\Rightarrow\left(2x-7\right)^2=4^2\)(vì 16 = 4²)

\(\Rightarrow2x-7=4\)

\(\Rightarrow2x=4+7\)

\(\Rightarrow2x=11\)

\(\Rightarrow x=11:2\)

\(\Rightarrow x=5,5\)

Vậy x = 5,5