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Andry
a fost răspuns

Calculati a * b , daca
a= 3 √48-4√18-5√108+6√72
b=2√162+5√75-2√50-11√12

Răspuns :

Renatemambouko
a= 3 √48-4√18-5√108+6√72=
=3√16×3-4√9×2-5√36×3+6√36×2=
=12√3-12√2-30√3+36√2=
=24√2-18√3=6(4√2-3√3)

b=2√162+5√75-2√50-11√12 =
=2√81×2+5√25×3-2√25×2-11√4×3 =
=18√2+25√3-10√2-22√3 =
=8√2+3√3


a×b=6(4√2-3√3)×(8√2+3√3)=
=6(32×2-24√6+12√6-9×3)=
=6(64-12√6-27)=
=6(37-12√6)

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