13. Solve,
[X+1 2 3 ]
[1 X+2 3 ]=0
[1 2 X+3 ]
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Answer:
i) (x + 1)2 = 2(x – 3). ( ii) x2 ... x3 – 4x2 – x – 1 – x3 + 6x2 – 12x + 8 = 0.
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