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Which is the correct factor form of (27a^3+8b^3)?(27a^3+8b^3) का सही गुणनखंड रूप कौन सा है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: ( (3a+2b)(9a^2-6ab+4b^2) )( (3a+2b)(9a^2-6ab+4b^2) )
This is ((3a)^3+(2b)^3), so the sum of cubes identity applies. Exam tip: the middle term inside the second factor is negative.यह ((3a)^3+(2b)^3) है इसलिए (a^3+b^3) की पहचान लगेगी। परीक्षा में योग घन में बीच वाला पद ऋणात्मक होता है।
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