Solve the following quadratic equations by factorisation.

$25m^2=9$

Solve the following quadratic equations by factorisation.

$7m^2=21m$

Solve the following quadratic equations by factorisation.

$m^2-11=0$

Solve the following quadratic equations by completing the square method.

$x^2+x-20=0$

Solve the following quadratic equations by completing the square method.

$x^2+2x-5=0$

Solve the following quadratic equations by completing the square method.

Solve the following quadratic equations by completing the square method.

Solve the following quadratic equations by completing the square method.

$2y^2+9y+10=0$

Solve the following quadratic equations by completing the square method.

$5x^2=4x+7$