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
0 reads0 ratings0 helpful

The product of the numbers that are 2 less and 9 more than a positive number is 620. What is the original number?

Answer and explanation

Correct answer: 22

Let the original number be x. Then \((x-2)(x+9)=620\), so \(x^2+7x-18=620\), or \(x^2+7x-638=0\). Factoring gives \((x-22)(x+29)=0\). Thus x=22 or x=-29; since the number is specified as positive, the correct answer is 22. Exam tip: verify the result in the original condition: \((22-2)(22+9)=20\times31=620\).

Related tags

Quadratic EquationsWord ProblemsFactorisationPositive IntegersVerificationWord Problems And ApplicationsMathematicsClass 10 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.