एक आयत मॉडल में लंबाई (2x+3) और चौड़ाई (2x-3) है। यह कौन सा क्षेत्रफल पहचान दिखाता है?
In a rectangle model, the length is (2x+3) and the width is (2x-3). Which area identity does it show?
Explanation opens after your attempt
B. \(4x^2-9\)
Concept
This is ((2x+3)(2x-3)), which gives \(4x^2-9\). Exam tip: connect product of sum and difference with difference of squares.
Why this answer is correct
The correct answer is B. \(4x^2-9\). This is ((2x+3)(2x-3)), which gives \(4x^2-9\). Exam tip: connect product of sum and difference with difference of squares.
Exam Tip
यह ((2x+3)(2x-3)) है जो \(4x^2-9\) देता है। परीक्षा में योग और अंतर के गुणन को वर्गों के अंतर से जोड़ें।
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