Question

if x plus 3y equals 6 then prove that x cube plus 27y cube plus 54xy equals 216​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

x + 3y = 6

Cubing both sides

x³ + (3y)³ + 3 × x × 3y (x + 3y) = 6³

x³ + 27y³ + 3 × x × 3y ×6 = 6³

x³ + 27y³ + 54xy = 216

Hence the proof follows