Question

Quadratic equations often do not have only a single solution. sometimes they may have two solutions or even no solutions. in this task you will look at some simple quadratic equations and extend the basic idea to some simple higher-order polynomials. what are the solutions to the equation x2 = 9?

Answer 1

x^2 = 9

x^2 - 9 = 0

(x + 3)(x - 3) = 0

x + 3 = or x - 3 = 0

x = -3 or x = 3