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=3(3akar2 + akar5) +2(3akar2 - akar5)
=9akar2 + 3akar5 + 6akar2 -2akar5
=15akar2 + akar5
B. 4m-n
=4(3akar2 + akar5) + (3akar2 - akar5)
=12akar2 + 4akar5 + 3akar2 -akar5
=15akar2 -akar5
C. mkuadrat + nkuadrat
=(3akar2 + akar5)kuadrat + (3akar2 - akar5)kuadrat
=9(2) +5 +9(2) -5
=18+18
=36
maaf tadi saya salah nulis, soal na tidak pake kaca^^