12. Quadratic Equations and Functions

Solve each quadratic equation using the square root property.

$2y^2=54$

Solve each quadratic equation using the square root property.

$3x^2+3=51$

Solve each quadratic equation using the square root property.

${(2z-3)}^2=16$

Solve each quadratic equation. If roots are not real, use $i$.

$2x^2+18=0$