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Ajutati-ma va rog cu ecuatia:

x²-3x√(2x-1)+2(2x-1)=0


Răspuns :

[tex] x^{2} -3x \sqrt{2x-1} +2(2x-1)=0 [/tex]
[tex]x^{2} -x \sqrt{2x-1}-2x \sqrt{2x-1} +2(2x-1)=0[/tex][tex]x(x -\sqrt{2x-1})-2\sqrt{2x-1}(x -\sqrt{2x-1})=0[/tex][tex](x -\sqrt{2x-1})(x-2\sqrt{2x-1})=0[/tex][tex][tex](x =\sqrt{2x-1}) ; x^{2} =2x-1; x^{2} -2x+1=0; (x-1)^{2} =0; x1=1[/tex];
 
[tex]x-2\sqrt{2x-1}=0; x=2\sqrt{2x-1}; x^{2} =4(2x-1); x^{2} -8x+4)=0[/tex]
Δ=64-16=48
x2=4+2√3
x3=4-2√3 Nu este solutie- din conditiile de existenta ale radicalilor