Ola Edna
x*y = 20
2*(x + y) = 18
x + y = 9
3x²y + 3xy² = 3xy*(x + y) = 3*20*9 = 540
pronto
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Ola Edna
x*y = 20
2*(x + y) = 18
x + y = 9
3x²y + 3xy² = 3xy*(x + y) = 3*20*9 = 540
pronto