Answers

2016-06-22T22:57:30+08:00
X²= 16  
x= 4

√x²=√16 square the x² and 16 and the answer will be
x= positive and negative 4 is the answer

r²-100=0
√r²=√100 square both sides
r= positive and negative 10 is the answer of the square of 100


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