defence exam CISF Constable Fireman Mock Test 2024 Quantitative Aptitude Algebra Identities

p + q + r = 5అయితే; p3 + q3 + r3 = 30మరియు p2 + q2 + r2 = 15 ఆపై 3pqrని కనుగొనాలా?

1

-20

2

20

3

25

4

-25

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