If 2x + y = 6 and xy = 4, then find the - CUETMOCK

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Home Questions V22ZZURNM2

Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Algebra

Question:

If 2x + y = 6 and xy = 4, then find the value of $8x^3 + y^3 $ is :

Options:

64

72

48

16

Correct Answer:

72

Explanation:

Given,

2x + y = 6

and xy = 4

Put x = 1 and y = 4, then the condition is satisfied.

8x³ + y³

= 8 × 13 + 43

= 8 + 64 = 72

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