Question

4x²-36=0

Answer 1

4x^2=0+36

4x^2=36

x^2=36:4

x^2=9

=> x=3

Vậy x=3

Dấu ^ là mũ 

Answer 2

4x²-36=0
=> 4x² = 36
=> x² = 36 : 4 = 9
=> x² = 3² hoặc x² = ( -3 )2
=> x = 3 hoặc x = -3

 

Answer 3

\(4x^2-36=0\)

\(4x^2=36\)

\(x^2=36:4\)

\(x^2=9\)

\(x=+-\sqrt{9}\)

\(x=3;-3\)

Answer 4

4x^2 - 36 = 0

4x^2 = 0+36

4x^2= 36

x^2= 36:4

x^2 = 9

X^2=3^2

x= 3