Am I right on this?

Question

this is true or false

The trinomial b^2 + 8 b + 21

is it false??

Answer 1

This is neither true nor false... it is simply an expression.

Answer 2

As others have said, this is just an algebraic expression; it does not have a truth value.
That being said, if it was part of a larger statement, the larger statement may be true or false. Rewriting it in completed square form will help with the most common statements you might be looking at:
b^2 + 8b + 21 = (b+4)^2 + 5
So, for instance, the expression has no zeroes; it has a minimum value of 5 when b is -4.

[detektibgapo is wrong, incidentally. Each of b^2, 8b and 21 is a monomial, and b^2 + 8b + 21 is a trinomial. It has nothing to do with how many variables are used: a^2 + 8bcdef - 7g^2dfs is also a trinomial.]

Answer 3

You question does not make sense. You might as well have asked: "Is 1 + 1 true?" In addition, the thing you described is not a trinomial. A trinomial involves 3 unknowns, just as its name implies (i.e., "tri" = 3). You have not even described a binomial, since that would involve 2 unknowns. Finally, even if your question were properly structured as an equation, or some other relationship, it would still not be true or false, as a situation with an unknown typically just involves determining what the unknown is, or could be. In short, you are wasting everybody's time. Say what you mean and stop posting nonsense.

Answer 4

yes it is, but mathematically we can put it this way:

take f(x) = Ax^2 + BX + C = 0

whetherf(x) will have real number root(s) determined by it's determinant

D(f(x)) is given by:

D = √( B^2 - 4*A*C)

for this case
g(b) = b^2 + 8 b + 21

then D = √(8^2 - 4*1*21)
D = √(64-84) = √(-20)
= i*√20

so D is an imaginary number. Then the polynomial g(b) do not have any real factor. And we can say it is prime.

Answer 5

yes it is false cos` a trinomial consists of 3 terms e.g 3x + 5y + 8n the last term... 21 should be non independant variable.

Answer 6

a trick question ye p yep plus they dont know...psst its 45+456165456156454421411x7323b83bx012342346f=10 trust me lol

Answer 7

its a BINOMIAL b'coz of the term b^2,thus its FALSE.

Answer 8

For very small values of b, yes you are right.

Answer 9

FALSE

The expression is only a MONOMIAL because it has only ONE term, b.

Answer 10

there is no question here...

shouldn't there be an = in that equation?