Use exponents to write 81 three different ways

If the discriminant if a quadratic equation is 4 which statement describes the roots?

Joe has some money in his bank account he deposits 45$ write an expression that represents the amount of money in joe's account

Asquare and an equilateral triangle have the same perimeter. each side the triangle is 4 inches longer than each side of the square. what is the perimeter of the square