Vocabulary * Imaginary number is a number whose square is less than or equal to zero. Ex. * A quadratic equation with real or complex coefficients has two solutions, called roots. Having or having a solution set. * Roots is where a function equals zero. In this example, -2 and 2 are the roots of the function x2 - 4 * Fractions are is numerical quantity that is not a whole number: 1/2, 0.5 * A Complex Number is a combination of a Real Number and an Imaginary Number Ex. 2+3i. 2 being the real number and 3 being the imaginary * A rational number is a number that can be in the form p/q , where p and q are integers and q is not equal to zero. * An irrational number is a number that cannot be written as a simple fraction, for example the famous one out there, π=3.14159265… * A parabola is a curve where any point is at an equal distance from the focus * Square root: a number that produces a quantity when multiplied by itself * A coordinate plane is spanned by the x and y-axis through points

Writing for Understanding
#23 The early discovery of the imaginary number first developed with the Greek mathematician and engineer Heron of Alexandria. Rafael Bombelli is the first one to set the rules of multiplication of the complex number in 1572. I think they were called imaginary numbers because the number just didn’t exist. Back then they thought so close minded that any number could’ve been imaginary, but they showed and