Home›MPPSC Forest›State Forest Service Mains Exam›Section 'B': Forestry and General Science›UNIT-10: Elementary Mathematics and General Mental Ability›Simple formula and their use factors, H.C.F., L.C.M. by factors, fractions, simple equations›What is the H.C.F. of 2x^2 - 3x - 9 and 2x^3 - 54?

What is the H.C.F. of 2x2−3x−92x^2 - 3x - 92x2−3x−9 and 2x3−542x^3 - 542x3−54?

20213M#mppsc-forest#pyq#mcq#2021
A.2x + 3
B.x - 3Correct
C.2x - 3
D.x + 3
Explanation & Solution

Correct Answer: (B) x - 3

Factorizing the first expression: 2x^2 - 3x - 9 = (2x + 3)(x - 3). Factorizing the second expression: 2x^3 - 54 = 2(x^3 - 27) = 2(x - 3)(x^2 + 3x + 9). The common factor in both expressions is (x - 3), which is the H.C.F.

हिंदी में प्रश्न एवं आदर्श उत्तर

2x2−3x−92x^2 - 3x - 92x2−3x−9 और 2x3−542x^3 - 542x3−54 का महत्तम समापवर्तक क्या है?

A.2x + 3
B.x - 3सही
C.2x - 3
D.x + 3

सही उत्तर: (B) x - 3

प्रथम व्यंजक के गुणनखंड: 2x^2 - 3x - 9 = (2x + 3)(x - 3)। द्वितीय व्यंजक के गुणनखंड: 2x^3 - 54 = 2(x^3 - 27) = 2(x - 3)(x^2 + 3x + 9)। दोनों व्यंजकों में उभयनिष्ठ गुणनखंड (x - 3) है, जो इनका महत्तम समापवर्तक (H.C.F.) है।

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