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Best Answer

x2 + 3x - 7 = 5x + 8; thus,

x2 + 3x - 7 - 5x - 8 = x2 - 2x - 15

= (x - 5)(x + 3) = 0.

Therefore the solution is

x = 5 or -3.

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โˆ™ 2010-06-11 10:38:56
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