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

If (f(x)=x^2+px+q) and (g(x)=x^2-px+q), and (f+g=2x^2+10), what is (q)?

Answer and explanation

Correct answer: (5)

Adding the two functions combines their corresponding terms. We have \\(f(x)=x^2+px+q\\) and \\(g(x)=x^2-px+q\\). The terms containing \\(p\\) cancel because one is \\(px\\) and the other is \\(-px\\). The two constant terms add, so the result is \\(2x^2+2q\\).

The question states that this sum is \\(2x^2+10\\). Comparing the constant terms gives \\(2q=10\\), and dividing by 2 gives \\(q=5\\). The value of \\(p\\) is irrelevant because its terms cancel. Therefore option A is correct. Comparing coefficients of like powers is a reliable method whenever two polynomial expressions are equal for all values of the variable.

Related tags

Relations-FunctionsParametersAddition

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.