math is the work of the devil.

(a+b)2 = a2 + 2ab + b2
(a-b)2 = a2 - 2ab + b2
a2 - b2 = (a+b)(a-b)


x= (-(b)+/- square root of (b)2 - 4ac) divided by 2a.

graph

length AB = square root of (y2-y1) + (x2-x1)

gradient = y1-y2 over x1-x2

y=mx + c

Midpoint= (x1+x2) divided by 2, (y1+y2) divided by 2

count units for parallelograms.

trigonometry fucking shit



TOA CAH SOH

pythagora's theorum (<3)

sine rule: a over sinA = b over sinB = c over sinC

cosine rule: a2= b2+c2 - abCosA.

and more shit.