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Question

Solve: 3x2+1+43x2+1=5

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Solution

3x2+1+43x2+1=53x2+1+4=53x2+1(3x2+1+4)2=(53x2+1)29x4+25+30x2=75x2+259x4=45x29x445x2=0x2(x25)=0x=0,±5

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