Răspuns:
x1=[tex]-1-2\sqrt{2}[/tex]
x2=[tex]-1+2\sqrt{2}[/tex]
Explicație pas cu pas:
radical din 16 +x^2=11-2x
4+x^2=11-x^2
4+x^2-11+2x=0
-7+x^2+2x=0
x^2=2x-7=0
x=[tex]\frac{-2+-\sqrt{2^{2}-4X*1*(-7) } }{2*1}[/tex]
X=[tex]\frac{-2+-\sqrt{4+28} }{2}[/tex]
X=[tex]\frac{-2+-\sqrt{32} }{2}[/tex]
X=[tex]\frac{-2+-4\sqrt{2} }{2}[/tex]
X=[tex]\frac{-2+4\sqrt{2} }{2}[/tex]
X=[tex]\frac{-2-4\sqrt{2} }{2}[/tex]
X=[tex]-1+2\sqrt{2} \\-1-2\sqrt{2}[/tex]
x1=[tex]-1-2\sqrt{2}[/tex]
x2=[tex]-1+2\sqrt{2}[/tex]
