Solve the equation 7x^2-8x=-1
7x²-8x=-17x²-8x+1=0on theorem Vieta if 7-8+1=0 ⇒x₁=1(7x²-7x)-(x-1)=07x(x-1)-(x-1)=0(x-1)(7x-1)=0x₂=1/7Answer: x₁=1 x₂=1/7
