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3 results found for "coefficient-b" in Class 10.

Question Medium Mathematics Quadratic Equations Introduction to Quadratic Equations Class 10 Level 30

समीकरण \(12-7x+x^2=0\) को \(ax^2+bx+c=0\) के रूप में लिखने पर (b) का मान क्या होगा?

When \(12-7x+x^2=0\) is written as \(ax^2+bx+c=0\), what is the value of (b)?

Explanation opens after your attempt
Correct Answer

B. (-7)

Step 1

Concept

In proper order, the equation is \(x^2-7x+12=0\). So the coefficient of (x) is (b=-7).

Step 2

Why this answer is correct

The correct answer is B. (-7). In proper order, the equation is \(x^2-7x+12=0\). So the coefficient of (x) is (b=-7).

Step 3

Exam Tip

सही क्रम में समीकरण \(x^2-7x+12=0\) है। इसलिए (x) का गुणांक (b=-7) है।

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Question Easy Mathematics Quadratic Equations Introduction to Quadratic Equations Class 10 Level 30

समीकरण \(2x^2-x+8=0\) में (x) का गुणांक क्या है?

What is the coefficient of (x) in \(2x^2-x+8=0\)?

Explanation opens after your attempt
Correct Answer

A. (-1)

Step 1

Concept

The coefficient of (-x) is (-1). It is necessary to write the coefficient with its sign.

Step 2

Why this answer is correct

The correct answer is A. (-1). The coefficient of (-x) is (-1). It is necessary to write the coefficient with its sign.

Step 3

Exam Tip

(-x) का गुणांक (-1) होता है। चिन्ह सहित गुणांक लिखना जरूरी है।

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Question Hard Science Chemical Substances – Nature and Behaviour Chemical Reactions and Equations Class 10 Level 2

मैग्नीशियम के जलने की अभिक्रिया में ऑक्सीजन अणु के आगे गुणांक एक है। संतुलित समीकरण में मैग्नीशियम के आगे कौन सा गुणांक होगा?

In the burning reaction of magnesium the coefficient before oxygen molecule is one. What coefficient will be before magnesium in the balanced equation?

Explanation opens after your attempt
Correct Answer

B. दोTwo

Step 1

Concept

One oxygen molecule has two oxygen atoms.

Step 2

Why this answer is correct

In magnesium oxide one magnesium combines with one oxygen.

Step 3

Exam Tip

Therefore two magnesium atoms are required. चरण 1: एक ऑक्सीजन अणु में दो ऑक्सीजन परमाणु होते हैं। चरण 2: मैग्नीशियम ऑक्साइड में एक मैग्नीशियम के साथ एक ऑक्सीजन जुड़ती है। चरण 3: इसलिए दो मैग्नीशियम परमाणुओं की जरूरत होगी।

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