-7x²-2x+3=0
7x²+2x-3=0
Δ=b²-4ac=2²-(4*-3*7)=4+84=88
x₁,₂= [tex]\frac{-b(+/-)\sqrt{88} }{2a}[/tex] = [tex]\frac{-2(+/-)2\sqrt{22} }{14}[/tex]=
[tex]\frac{-2+2\sqrt{22} }{14}[/tex] ∨ [tex]\frac{-2-2\sqrt{22} }{14}[/tex] =
[tex]\frac{2(-1+1\sqrt{22}) }{14}[/tex] ∨ [tex]\frac{2(-1-1\sqrt{22}) }{14}[/tex]
Result = [tex]\frac{(-1+1\sqrt{22}) }{7}[/tex] ∨ [tex]\frac{(-1-1\sqrt{22}) }{7}[/tex]
