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Draw a scaled copy of the circle using a scale factor of 2

If x-1 and x+3 are the factors of x3+10x2+ax+b find a and b

Darragh has a golden eagle coin in his collection with a mass of 13.551\,\text{g}13.551g. an uncirculated golden eagle coin has a mass of 13.714\,\text{g}13.714g.