1) x^2-16=0
x^2=16
x(1)=4 x(2)=-4
2) 25-y^2=0
y^2=25
y(1)=5 y(2)=-5
3) 3,24-z^2=0
z^2=3,24
z(1)=1,8 z(2)=-1,8
4) 144/169-n^2=0
n^2=144/169
n(1)= 12/13 n(2)=-12/13
5) 7,29-m^2=0
m^2=7,29
m(1)=2,7 m(2)=-2,7
6) k^2-196/625=0
k^2=196/625
k(1)=14/25 k(2)=-14/25