Digital SAT Math Formulas/One liners

Vertex of a parabola

x=-b/2a

ABC factoring

Know the method:

Average As a Repeated Number

Any isosceles right triangle is always?

A 45 45 90 triangle with sides in a ratio of x, x, x√2

The Complex Conjugate

It takes advantage of the difference of squares to make unwanted radicals or i's disappear.

Number of solutions for 2 lines

The Exponential equation

What's the conversion between degrees and radians

How do you do unit conversions for areas and square units?

You often need to multiply in 2 unit conversions to cancel out a square unit:

To find the intersection of two functions

The vertex equation of a parabola

What's a square unit conversion?

Exponential equations: how do you show something that happens every 5 years versus 5 times per year?

How do functions shifts/translations work?

What's the shortcut for the sum of the solutions of a quadratic?

The sum of the solutions of a quadratic:

The sum = -b/a