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4x² = 6 intreg si 1 supra 4 

Răspuns :

4x²=25/4
4x²·4=25
16x²=25
x²=25-16
x²=9
x=√9
x=3

[tex]4 x^{2} = 6\frac{1}{4} <=> 4 x^{2} = \frac{25}{4} | :4 <=> x^{2} = \frac{25}{16} <=> x= \sqrt{ \frac{25}{16} } <=> x= \frac{5}{4} [/tex]