Question

25х( в квадрате) = 1

Answer 1

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Answer 2

$25 x^{2} =1 \ 25 x^{2} -1=0 \ (5x-1)(5x+1)=0\5x-1=0\5x=1\x= frac{1}{5} =0.2\5x+1=0\5x=-1\x=- frac{1}{5} \ x=-0.2$