An imaginary number is a complex number that can be written as a real number multiplied by the imaginary unit i, which is defined by its property i² = ?1. The square of an imaginary number bi is ?b². For …
Category: Tutoring News
Exapmle: Factoring a Polynomial
and you’d have to guess again. This guess-and-check method is looooooong and tedious, at best. In fact, this particular quadratic is prime, so you could guess and check all day long and it would never factor. If you’re in pre-calculus and your teacher …
Trigonometry
What are the 3 trigonometric ratios? There are three basic trigonometric ratios: sine , cosine , and tangent . Given a right triangle, you can find the sine (or cosine, or tangent) of either of the non- 90° angles. Tutoring is available in …
The Quadratic Formula
The quadratic formula helps you solve quadratic equations, and is probably one of the top five formulas in math. We’re not big fans of you memorizing formulas, but this one is useful (and we think you should learn how to …