Question

решите уравнение c^2-0,25=0

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Answer 1

$c^2-0,25=0\\ c^2=0,25\\ c=\pm \sqrt{0.25}\\ c=\pm 0,5$

Answer 2

1. c²-0.25=0;

2. c²=0.25;

3. c1= -0.5;

4. c2=0.5;