Solve the following by matrix form.
X + y =8
X - y = 4...
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Rhombus adef is inscribed into a triangle abc so that they share angle a and the vertex e lies on the side bc . what is the length of the side of the rhombus if ab=c, and ac=b.
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Cos^2x+cos^2(120°+x)+cos^2(120°-x)i need this asap. pls me
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