vector{AC}=(4-3;1-3;1-1)=(1;-2;0)
vector{AC}=(4-5;1-5;1-(-2))=(-1;-4;3)
vector{z}=(2*2+3*1-5*(-1); 2*2+3*(-2)-5*(-4);2*(-3)+3*0-5*3)=(12;-7;-21)
vector{i}=(1;0;0)
vector{j}=(0;1;0)
vector{k}=(0;0;1)
|vector{i}|=|vector{i}|=|vector{i}|=1
пр_{ось Ох}(vector{z})=пр_{vector{i}}(vector{z})=(vector{z}*vector{i})/|vector{i}|=vector{z}*vector{i}=12*1+(-7)*0+(-21)*0=12
пр_{ось Оy}(vector{z})=пр_{vector{j}}(vector{z})=(vector{z}*vector{j})/|vector{j}|=vector{z}*vector{j}=12*0+(-7)*1+(-21)*0=-7
пр_{ось Оz}(vector{z})=пр_{vector{k}}(vector{z})=(vector{z}*vector{k})/|vector{k}|=vector{z}*vector{k}=12*0+(-7)*0+(-21)*1=-21