Respuestas
a.3x²y - (-8x²y) = 11x²y
b.-15m³n² - (-2m³n²) = -13m³n²
c.a⁵ - 9a³ + 6a² - 20 - (-a⁴ + 11a³ - a²)
= a⁵ + a⁴ - 20a³ + 7a² - 20
d.1/2x + 3/5y - 7/9z - (-3/5y + 1/2z - 1/2)
= 1/2x + 6/5y - 23/18 + 1/2
e.(9a - 2b + 7) - (2a - 6b + 21)
= 7a + 4b - 14
f.(8m² + 5 - 2 + 7m²) - (20m - 8 - m² + 5m)
= (15m² + 3) - (25m -8 - m²)
= 16m² - 25m + 11
g.-6a + b - (3a - 2b)
= -9a + 3b
h. x + 5x² + 5/2x - 1/3x² - (8/3x - 1/6x²)
= 14/3x² + 7/2x - 8/3x + 1/6x²
= 29/6x² + 5/6x
i.[3a - 2b - (2a - b)] - 8a - 2b + 5
= (a - b) - 8a - 2b + 5
= -7a -3b + 5
Respuesta:
a.3x²y - (-8x²y) = 11x²y
b.-15m³n² - (-2m³n²) = -13m³n²
c.a⁵ - 9a³ + 6a² - 20 - (-a⁴ + 11a³ - a²)
= a⁵ + a⁴ - 20a³ + 7a² - 20
d.1/2x + 3/5y - 7/9z - (-3/5y + 1/2z - 1/2)
= 1/2x + 6/5y - 23/18 + 1/2
e.(9a - 2b + 7) - (2a - 6b + 21)
= 7a + 4b - 14
f.(8m² + 5 - 2 + 7m²) - (20m - 8 - m² + 5m)
= (15m² + 3) - (25m -8 - m²)
= 16m² - 25m + 11
g.-6a + b - (3a - 2b)
= -9a + 3b
h. x + 5x² + 5/2x - 1/3x² - (8/3x - 1/6x²)
= 14/3x² + 7/2x - 8/3x + 1/6x²
= 29/6x² + 5/6x
i.[3a - 2b - (2a - b)] - 8a - 2b + 5
= (a - b) - 8a - 2b + 5
= -7a -3b + 5
no hay explicacion paso a paso porq ya esta bien explicado
gracias