# Ex.12.1 Q5 Algebraic Expressions Solution - NCERT Maths Class 7

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## Question

Classify into monomials, binomials and trinomials.

(i) $$4y – 7z$$ (ii) $$y^2$$ (iii) $$x + y – xy$$ (iv) $$100$$

(v) $$ab – a – b$$ (vi) $$5 – 3t$$ (vii) $$4p^2q – 4pq^2$$ (viii) $$7mn$$

(ix) $$z^2 – 3z + 8$$ (x) $$a^2 + b^2$$ (xi) $$z^2 + z$$ (xii) $$1 + x + x^2$$

## Text Solution

Steps:

Monomial means expression having single term.

Binomials means expression having two terms.

Trinomials means expression having three terms.

 S No. Expression No. of terms Classification (i) $$4y – 7z$$ $$2$$ Binomial (ii) $$y^2$$ $$1$$ Monomial (iii) $$x + y – xy$$ $$3$$ Trinomial (iv) $$100$$ $$1$$ Monomial (v) $$ab – a – b$$ $$3$$ Trinomial (vi) $$5 – 3t$$ $$2$$ Binomial (vii) $$4p^2q – 4pq^ 2$$ $$2$$ Binomial (viii) $$7mn$$ $$1$$ Monomial (ix) $$z^2 – 3z + 8$$ $$3$$ Trinomial (x) $$a^2 + b^2$$ $$2$$ Binomial (xi) $$z^2 + z$$ $$2$$ Binomial (xii) $$1 + x + x^2$$ $$3$$ Trinomial

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