An equation uses the symbol

The '=' sign.

Step-by-step explanation:

The equals sign ( = ). for example:

3x + 1 = 8.

The  equals sign was invented by Robert Recorde of Tenby, South Wales, UK in the early part of the 16th century.

answer: -2+√x,-2-√x

i hope this , i don't know if you're looking for a pair or not.

let m = monomial

let t = trinomial

so, m times t = t.

monomial times a trinomial = another trinomial.