Question

(2x-3)²=36

Answer 1

\(\left(2x-3\right)^2=36\)

\(\Leftrightarrow\left(2x-3\right)^2=6^2\)

\(\Rightarrow2x-3=6\)

\(\Rightarrow2x=9\)

\(\Rightarrow x=4,5\)

Answer 2

(2x - 3)² = 36

=> 2x - 3 = 6 hoặc 2x - 3 = - 6

=> 2x = 9 hoặc 2x = - 3

=> x = 4,5 hoặc x = - 1,5

Answer 3

\(\left(2x-3\right)^2=36\)

\(\left(2x-3\right)^2=6^2\)hoặc\(\left(-6^2\right)\)

\(\Rightarrow2x-3=-6\)hoặc   \(2x-3=6\)

Th1: \(2x-3=-6\)

\(2x=3\)

\(x=1,5\)

Th2:\(2x-3=6\)

\(2x=9\)

\(x=4,5\)

Vậy \(x=1,5\) hoặc \(x=4,5\)