Tolong dibantu y guys a. x^2 - 4 = 0 b. 4x^2 - 9 = 0

a) x^2-4=0
x^2=4
x=√4
x= +-2
b) 4x^2-9=0
4x^2=9
x^2=9/4
x=√(9/4)
x= +-3/2

x^2 - 4 = 0
x^2 = 4
x = 2

4x^2 - 9 = 0
4x^2 = 9
x^2 = 9/4
x^2 = 2,25
x = 1,5