Expert Mathematics Quadratic Equations Class 10 Level 29

यदि (x-2+(5k-2)x+4k=0) में (x=-2) मूल है, तो (k) का मान क्या है?

If (x=-2) is a root of (x-2+(5k-2)x+4k=0), what is the value of (k)?

Explanation opens after your attempt
Correct Answer

A. (0)

Step 1

Concept

Putting (x=-2) gives (4-2(5k-2)+4k=0). Thus (8-6k=0), so \(k=\frac{4}{3}\).

Step 2

Why this answer is correct

The correct answer is A. (0). Putting (x=-2) gives (4-2(5k-2)+4k=0). Thus (8-6k=0), so \(k=\frac{4}{3}\).

Step 3

Exam Tip

(x=-2) रखने पर (4-2(5k-2)+4k=0) मिलता है। इससे (8-6k=0), इसलिए \(k=\frac{4}{3}\)।

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Mathematics Answer, Explanation and Revision Hints

यदि (x-2+(5k-2)x+4k=0) में (x=-2) मूल है, तो (k) का मान क्या है? / If (x=-2) is a root of (x-2+(5k-2)x+4k=0), what is the value of (k)?

Correct Answer: A. (0). Explanation: (x=-2) रखने पर (4-2(5k-2)+4k=0) मिलता है। इससे (8-6k=0), इसलिए \(k=\frac{4}{3}\)। / Putting (x=-2) gives (4-2(5k-2)+4k=0). Thus (8-6k=0), so \(k=\frac{4}{3}\).

Which concept should I revise for this Mathematics MCQ?

Putting (x=-2) gives (4-2(5k-2)+4k=0). Thus (8-6k=0), so \(k=\frac{4}{3}\).

What exam hint can help solve this Mathematics question?

(x=-2) रखने पर (4-2(5k-2)+4k=0) मिलता है। इससे (8-6k=0), इसलिए \(k=\frac{4}{3}\)।

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