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1.

3a +4b = 13 ab = 3 Find 1) 9a² + 16b² 2) 81 a⁴+ 256 b⁴​

Answer»

(î) (3a + 4B)² = (13)² 9a² + 16b² + 2ab =. 169 9a² + 16b² + 2X3.= 169. (ab=3) 9a² + 16b² = 169 –6 = 163 The ans. is 163



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