Question 669729
Foil
{{{sqrt(3/2)(1) + sqrt(3/2)(-sqrt(3/2)) + 1(1) + 1(-sqrt(3/2))}}}
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{{{cross(sqrt(3/2)) - 3/2 + 1 - cross(sqrt(3/2))}}}
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{{{-(3/2) + 1 = -3/2 + 1(2/2) = -3/2 + 2/2 = highlight_green(-1/2)}}}

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