Concept-wise Practice

sign MCQ Questions for Class 10

sign se related questions ko ek jagah revise karein. Har question me bilingual content, answer feedback aur explanation available hai.

All Tags Search Similar

Practice Questions

4 questions tagged with sign.

Question 1/4 Expert Mathematics Polynomials Polynomials in one variable Class 10 Level 48

यदि (p(x)=x-2+rx+9) के दोनों शून्यक समान और ऋणात्मक हैं, तो (r) का मान क्या होगा?

If both zeroes of (p(x)=x-2+rx+9) are equal and negative, what is the value of (r)?

Explanation opens after your attempt
Correct Answer

A. (6)

Step 1

Concept

For equal zeroes, \(r^2-36=0\), so \(r=\pm6\). For negative zeroes the sum must be positive (6), hence (r=6).

Step 2

Why this answer is correct

The correct answer is A. (6). For equal zeroes, \(r^2-36=0\), so \(r=\pm6\). For negative zeroes the sum must be positive (6), hence (r=6).

Step 3

Exam Tip

समान शून्यकों के लिए \(r^2-36=0\), अतः \(r=\pm6\)। ऋणात्मक शून्यक के लिए योग धनात्मक (6) होना चाहिए, इसलिए (r=6)।

Open Question Page
Ask Friends
Question 2/4 Medium Mathematics Polynomials Polynomials in one variable Class 10 Level 48

(p(x)=5x-3-8x-2+13x-21) में \(x^2\) का गुणांक क्या है?

What is the coefficient of \(x^2\) in (p(x)=5x-3-8x-2+13x-21)?

Explanation opens after your attempt
Correct Answer

B. (-8)

Step 1

Concept

The coefficient of the \(x^2\)-term \(-8x^2\) is (-8). Write the coefficient with its sign.

Step 2

Why this answer is correct

The correct answer is B. (-8). The coefficient of the \(x^2\)-term \(-8x^2\) is (-8). Write the coefficient with its sign.

Step 3

Exam Tip

\(x^2\) वाले पद \(-8x^2\) का गुणांक (-8) है। संकेत सहित गुणांक लिखना जरूरी है।

Open Question Page
Ask Friends
Question 3/4 Easy Mathematics Polynomials Polynomials in one variable Class 10 Level 48

\(8x^3-5x^2+4\) में \(x^2\) का गुणांक क्या है?

What is the coefficient of \(x^2\) in \(8x^3-5x^2+4\)?

Explanation opens after your attempt
Correct Answer

B. (-5)

Step 1

Concept

The \(x^2\)-term is \(-5x^2\), so the coefficient is (-5). Write the sign with the coefficient.

Step 2

Why this answer is correct

The correct answer is B. (-5). The \(x^2\)-term is \(-5x^2\), so the coefficient is (-5). Write the sign with the coefficient.

Step 3

Exam Tip

\(x^2\) वाला पद \(-5x^2\) है, इसलिए गुणांक (-5) है। चिह्न को गुणांक के साथ लिखें।

Open Question Page
Ask Friends
Question 4/4 Hard Mathematics Quadratic Equations Introduction to Quadratic Equations Class 10 Level 29

किस समीकरण के मूलों का गुणनफल ऋणात्मक होगा?

Which equation will have a negative product of roots?

Explanation opens after your attempt
Correct Answer

A. \(2x^2+3x-5=0\)

Step 1

Concept

The product of roots is \(\frac{c}{a}\). In the first option, \(\frac{-5}{2}<0\), so the product is negative.

Step 2

Why this answer is correct

The correct answer is A. \(2x^2+3x-5=0\). The product of roots is \(\frac{c}{a}\). In the first option, \(\frac{-5}{2}<0\), so the product is negative.

Step 3

Exam Tip

मूलों का गुणनफल \(\frac{c}{a}\) है। पहले विकल्प में \(\frac{-5}{2}<0\), इसलिए गुणनफल ऋणात्मक है।

Open Question Page
Ask Friends

sign Revision Links

All MCQ Tags

Browse concept directory

All Subjects

Subject-wise practice

Search sign

More keyword results