arjungurung2026 arjungurung2026

02-09-2021
Mathematics

contestada

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

Respuesta :

ferrybukantoro ferrybukantoro

02-09-2021

Step-by-step explanation:

the answer is in the photo as attached

Ver imagen ferrybukantoro

Answer Link

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

khan academy help:,)

Maya with her sister ..........going to cinema. (is ,are,am)

20 POINTS! What is the literal meaning of the following quote: "[The sword was] battle-blood hardened, not blenched it at fight / in hero's hand who held it ev

Is Population Pyramid in 2007 'High' or 'Low' Rate Of Population Growth?

PLEASE HELP URGENT!! What is the SI system? What are its benefits?

Find the slope of the line that contains (-1, 9) and (9, 9).

What is Untouchability

How did the actions of pacifists reveal US attitudes about entry into World War I? Pacifist labor strikes showed that the US would not be able to support the wa

if 10x=1/0.001 find the value of x

Please help explanation if possible