Răspuns:
x1,x2
Explicație pas cu pas:
ridicam la pătrat
(2x-1)^2-9=25
(2x-1)^2=34
4x^2-4x+1=34
4x^2-4x-33=0
a=4,b=-4,c=-33
Δ=b^2-4ac
Δ=16+528
Δ=544
=> x1=-b-radical Δ/2a
=4-4radical34/8
=4(1-radical 34)/8
=1-radical 34/2
=>x2=-b+radicalΔ/2a
=4+4radical 34/8
1+radical 34/2