apply_through_coercion

# File lib/matrix.rb, line 1384
    def apply_through_coercion(obj, oper)
      coercion = obj.coerce(self)
      raise TypeError unless coercion.is_a?(Array) && coercion.length == 2
      coercion[0].public_send(oper, coercion[1])
    rescue
      raise TypeError, "#{obj.inspect} can't be coerced into #{self.class}"
    end