एक (x) बाय (x) वर्ग के दो किनारों पर (7) चौड़ी पट्टियां जोड़ी गईं और कोने में (7) बाय (7) वर्ग जोड़ा गया। नया क्षेत्रफल क्या है?
Two strips of width (7) are added along two sides of an (x) by (x) square and a (7) by (7) corner square is added. What is the new area?
Explanation opens after your attempt
B. \(x^2+14x+49\)पूरा मॉडल
Concept
The two strips give (7x+7x=14x) and the corner gives (49). In exams check how many strips are added.
Why this answer is correct
The correct answer is B. \(x^2+14x+49\) / पूरा मॉडल. The two strips give (7x+7x=14x) and the corner gives (49). In exams check how many strips are added.
Exam Tip
दो पट्टियां (7x+7x=14x) देती हैं और कोना (49) देता है। परीक्षा में जोड़ी गई पट्टियों की संख्या देखें।
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