If $m^2 - n^2 = 21$ and m - n = 3 find t - CUETMOCK

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Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Algebra

Question:

If $m^2 - n^2 = 21$ and m - n = 3 find the value of m + n.

Options:

7

4

24

18

Correct Answer:

7

Explanation:

If $m^2 - n^2 = 21$

m - n = 3

find the value of m + n.

$m^2 - n^2$ = (m + n)(m - n)

21 = (m + n) (3)

(m + n) = 7

CUET Questions