Question

4х^2+4х+1=0


х^2-8х-84=0

Answer 1

4x²+4x+1=0
D=16-16=0
x=-4/8=-0,5

x²-8x-84=0
D=64+336=400
x₁=(8-20)/2=-6
x₂=(8+20)/2=14