You can put this solution on YOUR website! multiply out the expression
(x-(1/7))^2
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Use FOIL:
(x-(1/7))(x-(1/7))
F: x^2
O: -1/7 x
I: -1/7 x
L: (1/7)^2
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Combine:
x^2 -(2/7)x + 1/49
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Cheers,
Stan H.