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Which of the following should be added to make x4 + 64 a perfect square …(1) 4x2(2) 16x2(3) 8x2(4) -8x2 |
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Answer» (2) 16x2 x2 + 64 = (x2)2 + 82 – 2 x (x2) x 8 = (x2 – 8)2 2 x (x2) x 8 must be added i.e, 16x2 must be added |
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