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4(2x一2)(x十5)一(2x一3)(2x十1)=5
8(x一1)(x十5)一(2x一3)(2x十1)=5
8(x2+4x-5) - (4x2-4x-3) = 5
8x2+32x-40 - 4x2+4x+3 = 5
4x2+36x = 42
x2+9x = 21/2
x2+9x+36/4 = 21/2+36/4
(x+9/2)2 = 78/4
x = (-9±√78)/2
8(x一1)(x十5)一(2x一3)(2x十1)=5
8(x2+4x-5) - (4x2-4x-3) = 5
8x2+32x-40 - 4x2+4x+3 = 5
4x2+36x = 42
x2+9x = 21/2
x2+9x+36/4 = 21/2+36/4
(x+9/2)2 = 78/4
x = (-9±√78)/2
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