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    				| 1. | (-2x + 3y + 2z)2 का विस्तार ज्ञात कीजिए। | 
| Answer» (-2x + 3y + 2x)2 = (-2x)2 + (3y)2 + (2z)2 + 2(-2x)(3y) + 2(3y) (2z) + 2(-2x)(2z) = 4x2 + 9y2 + 4z2 – 12xy + 12yz – 8xz | |