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

First year profits of a business were $900 . Second year profits were $1200 . What percent of the first year profits were the second year profits.

Can someone help me please got to be in tomorrow

solve for m (r=3m+3z) solution is m=___, use integers or fractions for any numbers in the expression (simplify answer) please help

What are the possible values for x in the equation 4x^2 = 64(1) x=0 (2) x=4 (3) x=4,-4 (4) x=0,4,-4

her investment grew 22% to$610 how much did she invest____ ( solve as an equation or fraction)

@stewyWhich sentence uses a verb that agrees with its compound subject? A.Waiters and waitresses serve the diners at the banquet.B.cell phones and tablets i

How do tussock moths obtain energy in cellular respiration?

A 3.7 kg object is lifted to a Hight of 3 meters what is the potential energy of this object

What Is the Function of Alliteration in Literature?

There are 5 red balls,6 white balls and 7 green balls in a box.If one ball is taken without looking,what is the probability that it is white?