Solve `(x+2)(x+3)(x+8)(x+12)= 4x^(2)`

Solve : |(x^(2)-1,x^(2)+2x+1,2x^(2)+3x+1),(2x^(2)+x-1,2x^(2)+5x-3,4x^(2)+4x-3),(6x^(2)-x-2,6x^(2)-7x+2,12x^(2)-5x-2)| =0

Solve (x^(2)+x-2) (x^(2)+x-3)=12

Solve x^2+3x+5=0

Solve: x^2-2x+3=0 .

Solve: x^2+3x+9=0