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sign-error MCQ Questions for Class 10

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

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3 questions tagged with sign-error.

Question 1/3 Expert Mathematics Pair of Linear Equations in Two Variables Algebraic methods: Substitution method and Elimination method. Class 10 Level 56

यदि (5x-8y=-1) और (10x+8y=46), तो (y-x) का मान क्या है?

If (5x-8y=-1) and (10x+8y=46), what is the value of (y-x)?

Explanation opens after your attempt
Correct Answer

A. (1)

Step 1

Concept

Adding gives (15x=45), so (x=3) and (y=2). Therefore (y-x=-1); sign reversal can change the answer.

Step 2

Why this answer is correct

The correct answer is A. (1). Adding gives (15x=45), so (x=3) and (y=2). Therefore (y-x=-1); sign reversal can change the answer.

Step 3

Exam Tip

जोड़ने पर (15x=45), इसलिए (x=3) और (y=2)। अतः (y-x=-1), चिन्ह बदलने से उत्तर गलत हो सकता है।

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Question 2/3 Easy Mathematics Polynomials Polynomials in one variable Class 10 Level 47

\(x^2-7x\) में (x) का गुणांक क्या है?

What is the coefficient of (x) in \(x^2-7x\)?

Explanation opens after your attempt
Correct Answer

B. (-7)

Step 1

Concept

The multiplier of (x) is (-7). Treat the negative sign as part of the coefficient.

Step 2

Why this answer is correct

The correct answer is B. (-7). The multiplier of (x) is (-7). Treat the negative sign as part of the coefficient.

Step 3

Exam Tip

(x) के साथ लगा गुणक (-7) है। ऋण चिह्न को गुणांक का भाग मानें।

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Question 3/3 Expert Mathematics Polynomials Geometrical meaning of the zeroes of a polynomial. Class 10 Level 24

यदि (p(x)=-(x-3)(x+1)) है तो ग्राफ के शून्यक कौन से हैं?

If (p(x)=-(x-3)(x+1)), what are the zeroes of the graph?

Explanation opens after your attempt
Correct Answer

A. (3) और (-1)(3) and (-1)

Step 1

Concept

The outside negative sign does not change the zeroes. Set the factors equal to zero.

Step 2

Why this answer is correct

The correct answer is A. (3) और (-1) / (3) and (-1). The outside negative sign does not change the zeroes. Set the factors equal to zero.

Step 3

Exam Tip

बाहर का ऋण चिह्न शून्यकों को नहीं बदलता। गुणनखंडों को शून्य रखकर उत्तर निकालें।

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