If x3 + y3 = 126 x + y = 6 Find the va - CUETMOCK

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Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Algebra

Question:

If x³ + y³ = 126

x + y = 6

Find the value of xy.

Options:

4

5

10

15

Correct Answer:

5

Explanation:

x³ + y³ = 126

x + y = 6

(x + y)³ = x³ + y³ + 3xy (x + y)

216 = 126 + 18xy

xy = \(\frac{90}{18}\)

xy = 5

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