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Question

After solving this equation x2+8x38x3=x2+4x+44x+4, x is either 74 or m. Then, the value of m is:

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Solution

x2+8x38x3=x2+4x+44x+4
(x2+8x3)(4x+4)=(8x3)(x2+4x+4)
4x3+36x2+20x12=8x3+29x2+20x12
x2(4x+36)=x2(8x+29)
x=0,4x+36=8x+29
4x=7
x=0,74
Hence, m=0.

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