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Calculați a.(b+c) și a.b-a.c, unde:
a) a=4√33:√11+14√30:(2√10)-3.2√3+9√39:√13.
b=3√2.3√3+4√6.(-2)-4√2.√3+√2.√3;
c= √3.(3√2-√5)+ √2.(√3-2√5)+√5.(√3+2√2) .
b) a=3√2.√7-2√7.√2+4√7.2√2-5√2.√7;
b=√5.2√3-6√15.2+3√5.√3+15;
c=√45:√3-4√30:√2+√15.2-7√105:√7.​