Question

if x square+1/4x square=8.Find the value of x cube +1/8x cube​

Answer 1

Step-by-step explanation:

x² + 1/4x² = 8

(x)² + (1/2x)² + 1 = 9

( x + 1/2x )² = 9

x + 1/2x = 3

Doing cube both side

(x)³ + (1/2x)³ + 3(x)(1/2x)(x + 1/2x) = 27

x³ + 1/8x³ + 3/2 × 3 = 27

x³ + 1/8x³ = 27 - 9/2 = 45/2

Answer 2

Answer:

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