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    				| 1. | (2x + 3y)3 का विस्तार करो । | 
| Answer» (2x+3y)3 = 3C0 (2x)3 (3y)0 + 3C1 (2x)2 (3y)1 + 3C2 (2x)1 (3y)2 + 3C3 (2x)0 (3y)3 = 1 × 8x3 × 1 + 3 × 4x2 × 3y + 3 × 2x × 9y2 + 1 × 1 × 27y3 = 8x3 + 36x2y + 54xy2 + 27y3 | |