Back Basic Mathematical Laws and Formulas

Basic Mathematical Laws and Formulas

Name Description Notes
Commutative law a + b = b + a
a b = b a
Addition
Multiplication
Associative law (a + b) + c = a + (b + c)
(a b) c = a (b c)
Addition
Multiplication
Distributive law a (b + c) = a b + a c  
Pythagorean theorem a2 + b2 = c2 a, b, and c represent the lengths of the three sides of a triangle,
with c being the length of the hypotenuse
Quadratic formula Quadratic formula Solution for the general quadratic equation: ax2 + bx + c = 0
Exponents, multiplication of xaxb = xa+b Must have same base
Exponents, division of xa/xb = xa-b Must have same base
Exponents, base raised to two (xa)b = xab  
Exponent, negative x-a = 1/xa