Respuesta:
Hay dos posibles pares de números:
-4.405 y -3.405
3.405 y 4.405
Explicación paso a paso:
Consideración:
a = primer número
a+1 = consecutivo
(a+1)² = a² + 2a + 1
Planteamiento:
a² + (a+1)² = 31
a² + a² + 2a + 1 = 31
2a² + 2a + 1 - 31 = 0
2a² + 2a - 30 = 0
a = {-2±√((2²)-(4*2*-30))} / (2*2)
a = {-2±√(4+240)} / 4
a = {-2±√244} / 4
a = {-2±15.62} / 4
a₁ = {-2-15.62} / 4 = -17.62/4 = -4.405
a₂ = {-2+15.62} / 4 = 13.62/4 = 3.305
Comprobación:
-4.405² -3.405² = 19.4 + 11.6 = 31
4.405² + 3.405 = 19.4 + 11.6 = 31
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Verified answer
Respuesta:
Hay dos posibles pares de números:
-4.405 y -3.405
3.405 y 4.405
Explicación paso a paso:
Consideración:
a = primer número
a+1 = consecutivo
(a+1)² = a² + 2a + 1
Planteamiento:
a² + (a+1)² = 31
a² + a² + 2a + 1 = 31
2a² + 2a + 1 - 31 = 0
2a² + 2a - 30 = 0
a = {-2±√((2²)-(4*2*-30))} / (2*2)
a = {-2±√(4+240)} / 4
a = {-2±√244} / 4
a = {-2±15.62} / 4
a₁ = {-2-15.62} / 4 = -17.62/4 = -4.405
a₂ = {-2+15.62} / 4 = 13.62/4 = 3.305
Comprobación:
-4.405² -3.405² = 19.4 + 11.6 = 31
4.405² + 3.405 = 19.4 + 11.6 = 31