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Which of the following expressions is equal to 2x^2+8

Find the greatest common factor of the followig monomials 46g^2h and 34g^6h^6

The point of intersection of the diagonals of a rectangle is 4 cm further away from the smaller side then from the larger side of the rectangle. the perimeter of the rectangle is equal to 56 cm. find the lengths of the sides of the rectangle. 16 points answer quick