If a - b = 3 and a2 + b2 = 29 - CUETMOCK

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Home Questions 7PNK92AVB4

Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Algebra

Question:

If a - b = 3 and

a² + b² = 29,

then the value of ab is:

Options:

12

11

10

16

Correct Answer:

10

Explanation:

Given,

a - b = 3

a² + b² = 29 $a^{2} + b^{2} = 45$

( a - b )² = a² + b² - 2ab

9 = 29 - 2ab

ab = 10

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