4) Which of the following is a trinomial ?
a) -7z
b) z² – 4y²
c) x²y – xy² + y²
d) 12a – 9ab + 5b – 3.
Answers
4) Which of the following is a trinomial ?
ans:-c) x²y – xy² + y²
Given : polynomials
(а) -7z
(b) z² – 4y²
(c) x²y – xy² + y²
(d) 12a – 9ab + 5b – 3.
To Find : Which one is Trinomial
Solution:
Monomial
A monomial is number, a variable, or a product of numbers and variables with whole number exponents.
Monomial - A polynomial with single Term
Binomial - A polynomial with 2 terms
Trinomial - A polynomial with 3 terms
(а) -7z only one term hence Monomial
(b) z² – 4y² Two terms Hence Binomial
(c) x²y – xy² + y² Three terms hence Trinomial
(d) 12a – 9ab + 5b – 3. Four terms hence quadrinomial
So correct option is c) x²y – xy² + y²
x²y – xy² + y² is Trinomial
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