Según el polinomio R(x; y) = 7x²y - 5xy, halla el valor numérico de R(x; y) si x = -1 e y = -3.
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Respuesta:
R(x; y) = 7x²y - 5xy
Hallar "R(-1; -3)
R(x; y) = 7x²y - 5xy
R(-1; -3) = 7[(-1)²](-3) - 5(-1)(-3)
R(-1; -3) = 7(1)(-3) - 5(3)
R(-1; -3) = 7(-3) - 15
R(-1; -3) = -21 -15
R(-1; -3) = -36
El valor de "R(-1; -3)" es -36
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