Identify the expression as monomial, binomial or trinomial :
$5 x^{2} - 9$

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Solution

Identifying the algebraic expression
We know that,
A polynomial that contains only one term is called a monomial
A polynomial that contains only two-term is called a binomial
A polynomial that contains only three terms is called a trinomial
An algebraic expression $5 x^{2} - 9$ contains only two-term so, it is identified as binomial
Hence algebraic expression $5 x^{2} - 9$ is binomial

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