помогите!!
[tex]3a + \frac{1}{2a} = 4[/tex]
если так, то
[tex]9a {}^{2} + \frac{1}{4a {}^{2} } = [/tex]
???
[tex]3a + \frac{1}{2a} = 4[/tex]
если так, то
[tex]9a {}^{2} + \frac{1}{4a {}^{2} } = [/tex]
???
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