arjungurung2026
arjungurung2026 arjungurung2026
  • 02-09-2021
  • Mathematics
contestada

if a- 2b +3c =0 prove that a³ -8b³+ 27c²= - 18abc​

Respuesta :

ferrybukantoro
ferrybukantoro ferrybukantoro
  • 02-09-2021

Step-by-step explanation:

the answer is in the photo as attached

Ver imagen ferrybukantoro
Answer Link
mhanifa
mhanifa mhanifa
  • 02-09-2021

Answer:

Use the identity:

  • x³ + y³ + z³ = 3xyz if x + y + z = 0

Substitute:

  • x = a, y = -2b, z = 3c

to get

  • a³ + (-2b)³ + (3c)³ = 3a(-2b)(3c)
  • a³ - 8b³ + 27c³ = --18abc
Answer Link

Otras preguntas

HELPPPPPPP MEEEEEEEE !
Two adjectives to describe Charles Dickens' literary works. ​
Cumplen la función de Núcleo del Sujeto: (1.00 pts): A.) Sustantivo / Pronombre B.) Infinitivo / Adjetivo C.) Adverbio / Proposición sustantiva. D.) Todas son c
Instructions Read the following passage from the informational text “Donna O’Meara: The Volcano Lady,” which uses a variety of text structures to organize infor
What is the measure of angle 1? 1)86 2)88 3)90 4)92
How many pages does Kevin read per hour? *
DNA is unique to each____________. (A. Recipe (B. Organism (C. Identical twin (D. Still Object
The gallons of gasoline used on a car trip varies directly as the number of miles driven. If 25 gallons of gasoline has been used after driving 700 miles,how ma
please help,, will mark brainliest!!
Why were families afraid of sending their daughters to school? State any two reasons