Question

Find the value of 27x³+8y³ y

3x+2y=20 and xy $\frac{11}{9}$

Answer 1

Step-by-step explanation:

Hence the value of 27 x 3 + 8 y 3 is 7440 .

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Answer 2

Answer:

7560

Step-by-step explanation:

(3x+2y)³ = (3x)³ + (2y)³ + 3 (3x) (2y) (3x+2y)

∴ 20³ = 27³ + 8y³ + 18xy(20)

∴ 8000 = 27x³ + 8y³ + 22 (20)

∴ 8000 = 27x³ + 8y³ + 440

∴ 27x³ =8000-440

∴ 27 + 8y³

=7560