यदि \(x=\sqrt{7}\), तो \(x^2+4x\) किसके बराबर है?

If \(x=\sqrt{7}\), what is \(x^2+4x\) equal to?

Explanation opens after your attempt
Correct Answer

A. \(7+4\sqrt{7}\)

Step 1

Concept

(x-2=\(\sqrt{7}\)2=7).

Step 2

Why this answer is correct

\(4x=4\sqrt{7}\), so \(x^2+4x=7+4\sqrt{7}\).

Step 3

Exam Tip

Simplify the square and the multiplication separately. चरण 1: (x-2=\(\sqrt{7}\)2=7)। चरण 2: \(4x=4\sqrt{7}\), इसलिए \(x^2+4x=7+4\sqrt{7}\)। चरण 3: वर्ग और गुणा को अलग-अलग सरल करें।

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Mathematics Answer, Explanation and Revision Hints

यदि \(x=\sqrt{7}\), तो \(x^2+4x\) किसके बराबर है? / If \(x=\sqrt{7}\), what is \(x^2+4x\) equal to?

Correct Answer: A. \(7+4\sqrt{7}\). Explanation: चरण 1: (x-2=\(\sqrt{7}\)2=7)। चरण 2: \(4x=4\sqrt{7}\), इसलिए \(x^2+4x=7+4\sqrt{7}\)। चरण 3: वर्ग और गुणा को अलग-अलग सरल करें। / Step 1: (x-2=\(\sqrt{7}\)2=7). Step 2: \(4x=4\sqrt{7}\), so \(x^2+4x=7+4\sqrt{7}\). Step 3: Simplify the square and the multiplication separately.

Which concept should I revise for this Mathematics MCQ?

(x-2=\(\sqrt{7}\)2=7).

What exam hint can help solve this Mathematics question?

Simplify the square and the multiplication separately. चरण 1: (x-2=\(\sqrt{7}\)2=7)। चरण 2: \(4x=4\sqrt{7}\), इसलिए \(x^2+4x=7+4\sqrt{7}\)। चरण 3: वर्ग और गुणा को अलग-अलग सरल करें।