Use the discriminant to determine the number and type of solutions for the following quadratic equation. \[x^{2}-3 x-28=0\]

Use the discriminant to determine the number and type of solutions for the following quadratic equation. \[x^{2}+3 x+11=0\]

Use the discriminant to determine the number and type of solutions for the following quadratic equation. \[4 x^{2}-4 x+1=0\]

Solve using the quadratic formula. \[x^{2}+10 x+9=0\]

Solve using the quadratic formula. \[x^{2} -10 x+34 = 0\]

Solve using the quadratic formula. \[x^{2}+81 = 0\]

Solve using the quadratic formula. \[9y^{2} - 2 = 0\]