oblicz 1/5-2√5 =
tak żeby nie bylo nierównosci
1,5 = 0,2
2√5 = √5*√5 = √25 = 5
0,2 - 5 = -4,8
⅕ - 2√5= ⅕ - (√5·√5) = ⅕ -√25= ⅕ - 5 = -4⁴/₅ = -4,8
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1,5 = 0,2
2√5 = √5*√5 = √25 = 5
0,2 - 5 = -4,8
⅕ - 2√5= ⅕ - (√5·√5) = ⅕ -√25= ⅕ - 5 = -4⁴/₅ = -4,8