Plane and simple riddles what did et do in the restaurant

The sum of the reciprocal of a positive number and the reciprocal of 2 more than the number is 3/4 equation: the number is

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

Me asap on # : explain how factoring a trinomial, ax^2+ bx+ c, when a does not equal 1 different from factoring a trinomial when a = 1.