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# 1.Identify the terms, their coefficients for each of the following expressions : (i) $$5xyz^2 – 3zy$$ (ii) $$1 + x + x^2$$ (iii) $$4x^2y^2 – 4x^2y^2z^2 + z^2$$ (iv) $$3 – pq + qr -rp$$ (v) $$\frac { x }{ 2 } +\frac { y }{ 2 } -xy$$ (vi)$$0.3a – 0.6ab + 0.5b$$

(i) We have the expression $$5xyz^2 – 3zy$$, the terms are $$5xyz^2$$ and $$-3zy$$.
Coefficient of $$xyz^2$$ in the term $$5xyz^2$$ is 5.

Coefficient of $$zy$$ in the term $$– 3yz$$ is $$– 3$$.

(ii)We have the expression $$1 + x + x^2$$, the terms are 1, x and $$x^2$$.

Coefficient of the term 1 is 1.

Coefficient of x in the term x is 1.

Coefficient of $$x^2$$ in the term $$x^2$$ is 1.

(iii) We have the expression $$4xy – 4xyz + z$$ , the terms are $$4x^2y^2, – 4x^2y^2z^2$$ and $$z^2$$.

Coefficient of $$x^2y^2$$ in the term $$4x^2y^2$$ is 4.

Coefficient of $$x^2y^2z^2$$ in the term $$– 4x^2y^2z^2$$ is – 4.

Coefficient of $$z^2$$ in the term $$z^2$$ is 1.

(iv) We have the expression $$3 – pq + qr – rp$$, the terms are 3, – pq, qr and – rp.

Coefficient of the term 3 is 3.

Coefficient of pq in the term – pq is -1.

Coefficient of qr in the term qr is 1.

Coefficient of rp in the term – rp is -1.

(v) We have the expression $$\frac { x }{ 2 } +\frac { y }{ 2 } -xy$$, the terms are $$\frac { x }{ 2 } ,\frac { 7 }{ 2 }$$ and $$– xy$$.

Coefficient of x in the term $$\frac { x }{ 2 }$$ is $$\frac { 1 }{ 2 }$$

Coefficient of y in the term $$\frac { y }{ 2 }$$ is $$\frac { 1 }{ 2 }$$

Coefficient of xy in the term $$– xy$$ is -1.

(vi) In the expression $$0.3a -0.6 ab + 0.5 b$$, the terms are $$0.3a, – 006ab$$and $$0.5b$$.

Coefficient of a in the term 0.3a is 0.3.

Coefficient of ab in the term – 0.6ab is – 0.6.

Coefficient of b in the term 0.5b is 0.5.