Question

x^3 - 8y^3 - 36xy-216​

Answer 1

Answer:

pratapDhingra

pratapDhingra

08.05.2015

Math

Secondary School

+5 pts

Answered

Find the value of x3-8y3-36xy-216, at x = 2y+6

Answers

The Brain

Brainly User

so given

x = 2y+6

⇒ x - 2y = 6 ...... (i)

cubing both sides

⇒ x³ - 8y³ - 6xy(x - 2y) = 216

⇒ x³ - 8y³ - 6xy(6) = 216 {since , x - 2y = 6 from i}

⇒x³ - 8y³ - 36xy - 216 = 0

so the value of x³ - 8y³ - 36xy - 216 = 0 ANSWER