Update

Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है

Subjects
1 reads0 ratings0 helpful

Which of the following expressions has 5ab as its highest common factor (HCF)?

Answer and explanation

Correct answer: 10a^2b + 15ab^2

The correct answer is A: 10a^2b + 15ab^2. Find the HCF in two parts. First, the numerical coefficients 10 and 15 have HCF 5. Next, both terms contain a and b. The smallest power of a present in both terms is a^1, and the smallest power of b is b^1. Thus the algebraic HCF is 5ab. Dividing the expression by 5ab gives 2a + 3b, confirming that 10a^2b + 15ab^2 = 5ab(2a + 3b). Option B does not have b in its first term, so ab cannot be common. Option C does not have a in its second term, so ab cannot be common. Option D has numerical HCF 6, together with ab, so its HCF is 6ab rather than 5ab. The important rule is to use the HCF of the coefficients and the lowest exponent of each variable common to every term.

Related tags

FactorisationHighest-Common-FactorAlgebraic-ExpressionsClass-9-MathematicsExploring Algebraic IdentitiesMathematicsClass 9 Mcq

Was this question useful?

No ratings yetWrite a review / Rate this question

Student Reviews

No published reviews yet.

Add Muft Shiksha to your Home Screen

In Safari, tap Share, then Add to Home Screen.