भुजा (4x-1) वाले वर्ग के दृश्य मॉडल में मध्य पद क्या होगा?
What is the middle term in the visual model of a square with side (4x-1)?
Explanation opens after your attempt
B. (-8x)correct middle
Concept
((4x-1)2=16x-2-8x+1). In exams the sign of (2ab) depends on the sign in the side.
Why this answer is correct
The correct answer is B. (-8x) / correct middle. ((4x-1)2=16x-2-8x+1). In exams the sign of (2ab) depends on the sign in the side.
Exam Tip
((4x-1)2=16x-2-8x+1) होता है। परीक्षा में (2ab) का चिन्ह भुजा के चिन्ह से तय करें।
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