Solution:
x²-100=0
x²-100+100=0+100
x²=100
] Rewrite it to the form of x² = r by adding the both side of the equation by 100
x²=100
x=±√100
x=±10
x = 0 or x = - 10
] Since r=100 which is greater than 0(r>0) we need to use property one
For checking:
For x=10 For x=-10
x²-100=0 x²-100=0
(10)²-100=0 (-10)²-100=0
100-100=0 100-100=0
0=0 0=0
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