8x²-1=(3x-1)(2x+3)
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8x²-1=(3x-1)(2x+3)
8x²-1=(3x-1)(2x+3)
8x²-1=(3x-1)(2x+3)
8x²-1=(3x-1)(2x+3)
8x^2-1=6x^2+7x-3
2x^2-7x+2=0
x^2-7x/2=-1
(x-7/4)^2=33/16
x-7/4=土√33/4
x1=7/4+√33/4 x2=7/4-√33/4 .
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