Answers

2015-06-13T20:06:07+05:30
1.)x²=16
that means x*x=16
x=√16= +ve 4 or -ve 4
(4*4=16, -4*-4=16)

2.)t²=81
t*t=81
t=√81= +ve 9 or -ve 9

3.)R²-100=0
R²=100
R=√100= +ve 10 or -ve 10

4.)X²-144=0
X²=144
x=√144= +ve 12 or -ve 12

5.)2S²=50
S²=50÷2=25
S²=25.
S=+ve 5 or -ve 5
1 5 1