ABC26GN0959 · Simplification

Subject: General Aptitude · Chapter: Simplification · Exam: 2007 · Marks: · Difficulty:

The value of 2a3 – [3a3 + 4b3 – {2a3 + (– 7a3)} + 5a3 – 7b3] is
(a)– 11a3 + 3b3
(b)7b3 + 3a3
(c)11a3 – 3b3
(d)– (11a3 + 3b3)
Answer
Answer (as printed): A
Explanation
Given exp. = 2a3 – [3a3 + 4b3 – {– 5a3} + 5a3 – 7b3] = 2a3 – [3a3 + 4b3 + 5a3 + 5a3 – 7b3] = 2a3 – [13a3 – 3b3] = 2a3 – 13a3 + 3b3 = – 11a3 + 3b3.

Explanation as extracted from the printed page; notation may be imperfect.

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