Answer
No
Work Step by Step
As we can see with the following example, the sum of two trinomials is not always a trinomial
$(7x^{2}+x+1)+(2x^{2}-x+4)$
$9x^{2}+5$
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 8 - Polynomials and Factoring - 8-1 Adding and Subtracting Polynomials - Practice and Problem-Solving Exercises - Page 479: 49
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