shortest distance from line in $\mathbb{R}^3$ to point etc (clalc class test 2014)

 

Basic complex numbers calculations

 

Basic calculation with complex numbers, example (class test 2014)

 

Basic complex number calculations (class test 2014)

 

Find roots and factorise $z^6+64$ (class test 2014)

 

Factorise into real linear and quadratic factors, $p(z)=z^5-32$, (Alg Class test 2014) Q3

 

Find the complex square roots (Alg Class test 2014)