Medium Mathematics Quadratic Equations Class 10 Level 28

एक आयत की लंबाई चौड़ाई से (4) अधिक है और क्षेत्रफल (45) है। यदि चौड़ाई (x) है, तो समीकरण क्या होगा?

A rectangle has length (4) more than its breadth and area (45). If the breadth is (x), what is the equation?

Explanation opens after your attempt
Correct Answer

A. \(x^2+4x-45=0\)

Step 1

Concept

The length is (x+4), so (x(x+4)=45). This forms \(x^2+4x-45=0\).

Step 2

Why this answer is correct

The correct answer is A. \(x^2+4x-45=0\). The length is (x+4), so (x(x+4)=45). This forms \(x^2+4x-45=0\).

Step 3

Exam Tip

लंबाई (x+4) होगी, इसलिए (x(x+4)=45)। इससे \(x^2+4x-45=0\) बनता है।

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Mathematics Answer, Explanation and Revision Hints

एक आयत की लंबाई चौड़ाई से (4) अधिक है और क्षेत्रफल (45) है। यदि चौड़ाई (x) है, तो समीकरण क्या होगा? / A rectangle has length (4) more than its breadth and area (45). If the breadth is (x), what is the equation?

Correct Answer: A. \(x^2+4x-45=0\). Explanation: लंबाई (x+4) होगी, इसलिए (x(x+4)=45)। इससे \(x^2+4x-45=0\) बनता है। / The length is (x+4), so (x(x+4)=45). This forms \(x^2+4x-45=0\).

Which concept should I revise for this Mathematics MCQ?

The length is (x+4), so (x(x+4)=45). This forms \(x^2+4x-45=0\).

What exam hint can help solve this Mathematics question?

लंबाई (x+4) होगी, इसलिए (x(x+4)=45)। इससे \(x^2+4x-45=0\) बनता है।

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