Question

x la patrat -4=0
x la patrat +4=0
4x la patrat -25 =0
3x la patrat+1=0​

Answer 1

x^2-4=0

x^2=4

x1= -2

x2=2

x^2+4=0

x^2=-4 ecuatia nu are solutii reale

4x^2=25

x^2=25/4

x1=-5/2

x2=5/2

3x^2=-1 ec nu are sol reale