Question

A) efetue
B)efetue aplicando as fórmulas de produtos notáveis :
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Answer 1

$\Large\boxed{\begin{array}{l}\rm A)\\\tt a)~\sf(3+2i)(3-i)=11+3i\\\tt b)~\sf(1+i)\cdot(2+3i)=-1+5i\\\tt c)~\sf(1+3i)2i=-6+2i\\\tt d)~\sf-2i(-3+5i)=10+6i\\\tt e)~\sf(2+3i)(4-2i)=14+8i\end{array}}$

$\Large\boxed{\begin{array}{l}\tt f)~\sf(5+i)(3-2i)=17-7i\\\tt g)~\sf(4i-3)(2i-2)=-2-14i\\\tt h)~\sf(3i+1)(4i-3)=-15-5i\\\tt i)~\sf2i(3i+4)=-6+8i\\\tt j)~\sf(-5+2)(3i-5)=15-9i\end{array}}$

$\Large\boxed{\begin{array}{l}\rm B)\\\tt a)~\sf(3-2i)^2=5-12i\\\tt b)~\sf(4+2i)^2=12+16i\\\tt c)~\sf(5-3i)^2=16-30i\\\tt d)~\sf(2+3i)^2=-5+12i\\\tt e)~\sf(4-5i)(4+5i)=41\\\tt f)~\sf(7-2i)(7+2i)=53 \end{array}}$