Question 638120
There are five main types of algebraic equations, distinguished by the 
position of variables, the types of operators and functions used, and the behavior of their graphs. Each type of equation has a different expected 
input and produces an output with a different interpretation.


Monomial/Polynomial Equations

    Monomials and polynomials are equations consisting of variable terms 
with whole number exponents. Polynomials are classified by the number of 
terms in the expression: 
Monomials have one term, binomials have two terms, trinomials have three terms. Any expression with more than one term is called a polynomial. 


Exponential Equations

    Exponential equations are distinguished from polynomials in that they have variable terms in the exponents.



Logarithmic Equations

    Logarithmic functions are the inverse of exponential functions. For the equation {{{y = 2^x}}}, the inverse function is {{{y = log(2,x)}}}. 


Rational Equations

    Rational equations are algebraic equations of the form {{{p(x)/q(x)}}}, where {{{p(x)}}} and {{{q(x)}}} are both polynomials. 


Trigonometric Equations

    Trigonometric equations contain the trigonometric functions:

sin, cos,tan, sec, csc and cot 


in your case, equation {{{x + 12 = -1.7}}} has three terms: so, it is {{{trinomial}}}