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Question 31/35 Medium Mathematics Polynomials Polynomials in one variable Class 10 Level 46

(p(x)=3x+12) का शून्य कौन सा है?

Which is the zero of (p(x)=3x+12)?

Explanation opens after your attempt
Correct Answer

B. (-4)

Step 1

Concept

From (3x+12=0), we get (x=-4). A zero is the value that makes the polynomial equal to (0).

Step 2

Why this answer is correct

The correct answer is B. (-4). From (3x+12=0), we get (x=-4). A zero is the value that makes the polynomial equal to (0).

Step 3

Exam Tip

(3x+12=0) से (x=-4) मिलता है। शून्य वह मान है जिससे बहुपद (0) हो जाए।

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Question 32/35 Easy Mathematics Quadratic Equations Introduction to Quadratic Equations Class 10 Level 29

यदि (x=-1) समीकरण \(x^2+mx-6=0\) का हल है तो (m) का मान क्या होगा?

If (x=-1) is a solution of \(x^2+mx-6=0\), what is the value of (m)?

Explanation opens after your attempt
Correct Answer

B. (-5)

Step 1

Concept

Putting (x=-1) gives (1-m-6=0). So (-m-5=0) and (m=-5).

Step 2

Why this answer is correct

The correct answer is B. (-5). Putting (x=-1) gives (1-m-6=0). So (-m-5=0) and (m=-5).

Step 3

Exam Tip

(x=-1) रखने पर (1-m-6=0) मिलता है। इसलिए (-m-5=0) और (m=-5) है।

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Question 33/35 Easy Mathematics Quadratic Equations Introduction to Quadratic Equations Class 10 Level 29

कौन सा मान \(x^2-25=0\) का एक हल है?

Which value is one solution of \(x^2-25=0\)?

Explanation opens after your attempt
Correct Answer

B. (5)

Step 1

Concept

Since \(5^2-25=0\), (5) is a solution of this equation.

Step 2

Why this answer is correct

The correct answer is B. (5). Since \(5^2-25=0\), (5) is a solution of this equation.

Step 3

Exam Tip

\(5^2-25=0\) है। इसलिए (5) इस समीकरण का हल है।

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Question 34/35 Easy Mathematics Quadratic Equations Introduction to Quadratic Equations Class 10 Level 28

यदि (x=1) है तो \(x^2+2x-3=0\) में बायां पक्ष कितना होगा?

If (x=1), what is the left side of \(x^2+2x-3=0\)?

Explanation opens after your attempt
Correct Answer

A. (0)

Step 1

Concept

Substituting gives \(1^2+2\cdot1-3=0\). So (1) is a solution.

Step 2

Why this answer is correct

The correct answer is A. (0). Substituting gives \(1^2+2\cdot1-3=0\). So (1) is a solution.

Step 3

Exam Tip

रखने पर \(1^2+2\cdot1-3=0\) मिलता है। इसलिए (1) एक हल है।

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Question 35/35 Easy Mathematics Quadratic Equations Introduction to Quadratic Equations Class 10 Level 28

कौन सा मान \(x^2-9=0\) का एक हल है?

Which value is one solution of \(x^2-9=0\)?

Explanation opens after your attempt
Correct Answer

B. (3)

Step 1

Concept

Since \(3^2-9=0\), (3) is a solution. For easy questions, check by substitution.

Step 2

Why this answer is correct

The correct answer is B. (3). Since \(3^2-9=0\), (3) is a solution. For easy questions, check by substitution.

Step 3

Exam Tip

\(3^2-9=0\) इसलिए (3) हल है। आसान प्रश्नों में मान रखकर जांच करें।

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