15 terms

Feel free to add more terms if I missed any (to edit, the password is 1234)!
For the quadratic formula, here: https://www.youtube.com/watch?v=2lbABbfU6Zc
It'll be stuck with you forever now. Mwahaha :)
Tips for absolute value inequalities: Remember, great OR less AND. The greater than inequalities are always split up (OR) and the less than inequalities are always together (AND).
When dividing an inequality by a negative number, ALWAYS flip the inequality sign.

Slope (rise/run)

y₂-y₁/x₂-x₁

Slope Intercept Formula

y=mx+b

Point Slope Formula

y-y₁=m(x-x₁)

General Form (for lines)

Ax+By=C

Standard Form (circles)

(x-h)²+(y-k)²=r² (center=(h,k))

Midpoint Formula

((x₁+x₂)/2 , (y₁+y₂)/2)

Distance Formula

√(x₂-x₁)²+(y₂-y₁)²

Quadratic Formula

x=(-b±√b₂-4ac)/2a

Cubic Function Formula

(a b)(a² ab b²) (Use Same Opposite AlwaysDifferent or SOAP for the + or −)

(a²-b²) (Difference of squares)

(a+b)(a−b)

Sum Formula (Sequences)

Sn=a₁/(1-r)

Arithmetic Sequence Formula

an=a₁+(n-1)d

Arithmetic Sequence Sum Formula

Sn=(n/2)(a₁+an)

Geometric Sequence Formula

an=ra(n-₁) (The n won't go down, but it's r times a *subscript* (n-1))

Geometric Sequence Sum Formula

Sn=[a₁(1-r^n)]/(1-r)