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7x^2 + 3x - 4 = 0
Factor
( 7x - 4)(x + 1) = 0
7ҳ - 4 = 0
7x = 4
x = 4/7
&
x + 1 = 0
x = -1
Mʏ web pаge; เซ็กซี่บาคาร่า |
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