Squares

Difference between two squares

Method for completing the square

The quadratic formula

${\displaystyle x=\frac{-<!--\; -\; -->b\pm <!--\; \pm \; -->{\displaystyle \sqrt{b^2-<!--\; -\; -->4ac}}}{2a}\text{when}a{x}^2+bx+c=0}$

Solve Quadratic Trinomials

The general form for a quadratic trinomial is:

$a{x}^2+bx+c$

Check out this video how to solve them:

Here is another method:

Also remember:

• If the sign of the third term is positive, then the signs of the factors will be the same.
• If the sign of the third term is negative, the signs of the factors will be different.

The highest common factor HCF

When it has been a few years since you last done some math, this video is excellent to refresh you memory, you will be able to get the highest common factor easily after this:

Operations and understanding the Vocabulary of Algebra

Operations

$+\times <!--\; \times \; -->+=+-<!--\; -\; -->\times <!--\; \times \; -->-<!--\; -\; -->=++\times <!--\; \times \; -->-<!--\; -\; -->=-<!--\; -\; -->-<!--\; -\; -->\times <!--\; \times \; -->+=-<!--\; -\; -->$
When they occur in same sentence; first \(\times\) then \(\div\) then + then -. Always left to right.

Understanding the Vocabulary of Algebra

What is a prime number?

List of prime numbers