Solve the given equation by factorisation and then use the quadratic formula to show that you get the same answers in both cases.

$x^2-2x-99=0$

Solve the given equation by factorisation and then use the quadratic formula to show that you get the same answers in both cases.

$x^2-9x-36=0$

Solve the given equation by factorisation and then use the quadratic formula to show that you get the same answers in both cases.

$x^2-10x+24=0$

Solve the given equation by factorisation and then use the quadratic formula to show that you get the same answers in both cases.

$x^2-12x+35=0$

Solve the given equation by factorisation and then use the quadratic formula to show that you get the same answers in both cases.

$x^2+9x-36=0$

 Solve the given equation by using the quadratic formula. Round your answers to $3$ significant figures where necessary. These quadratic expressions do not factorise.

 $x^2+6x-1=0$

 Solve the given equation by using the quadratic formula. Round your answers to $3$ significant figures where necessary. These quadratic expressions do not factorise.

 $x^2+5x+5=0$

 Solve the given equation by using the quadratic formula. Round your answers to $3$ significant figures where necessary. These quadratic expressions do not factorise.

 $x^2+7x+11=0$

Solve the given equation by using the quadratic formula. Round your answers to $3$ significant figures where necessary. These quadratic expressions do not factorise.

 $x^2+4x+2=0$