Answer:
Trinomial expressions
{\displaystyle 3x+5y+8z}3x+5y+8z with {\displaystyle x,y,z}x, y, z variables
{\displaystyle 3t+9s^{2}+3y^{3}}3t+9s^{2}+3y^{3} with {\displaystyle t,s,y}t,s,y variables
{\displaystyle 3ts+9t+5s}3ts+9t+5s with {\displaystyle t,s}t,s variables
{\displaystyle Ax^{a}y^{b}z^{c}+Bt+Cs}Ax^{a}y^{b}z^{c}+Bt+Cs with {\displaystyle x,y,z,t,s}x,y,z,t,s variables, {\displaystyle a,b,c}a,b,c nonnegative integers and {\displaystyle A,B,C}A,B,C any constants.
{\displaystyle Px^{a}+Qx^{b}+Rx^{c}}Px^{a}+Qx^{b}+Rx^{c} where {\displaystyle x}x is variable and constants {\displaystyle a,b,c}a,b,c are nonnegative integers and {\displaystyle P,Q,R}P,Q,R any constants.
Step-by-step explanation:
Trinomial equation
A trinomial equation is a polynomial equation involving three terms. An example is the equation {\displaystyle x=q+x^{m}}x=q+x^{m} studied by Johann Heinrich Lambert in the 18th century.