Identify the terms, their co-efficients for each of the following expressions.
(i) $7x^2yz - 5xy$
(ii) $x^2 + x + 1$
(iii) $3x^2y^2 - 5x^2y^2z^2 + z^2 + 1$
(iv) $9- ab + be-ca$
(v) $\frac{a}{2}+\frac{b}{2}-ab$
(vi) $2x - 0.3xy + 0.5y$

To do: 

We have to identify the terms and their coefficients for the given expressions.

 Solution: 

(i) $7x^2yz - 5xy$

Term	Coefficient
$7x^2yz$	$7$
$-5xy$	$-5$

(ii) $x^2 + x + 1$

Term	Coefficient
$x^2$	$1$
$x$	$1$
$1$	$1$

(iii) $3x^2y^2 - 5x^2y^2z^2 + z^2 + 1$

Term	Coefficient
$3x^2y^2$	$3$
$-5x^2y^2z^2$	$-5$
$z^2$	$1$
$1$	$1$

(iv) $9- ab + be-ca$

Term	Coefficient
$9$	$9$
$-ab$	$-1$
$be$	$1$
$-ca$	$-1$

(v) $\frac{a}{2}+\frac{b}{2}-ab$

Term	Coefficient
$\frac{a}{2}$	$\frac{1}{2}$
$\frac{b}{2}$	$\frac{1}{2}$
$-ab$	$-1$

(vi) $2x - 0.3xy + 0.5y$

Term	Coefficient
$2x$	$2$
$-0.3xy$	$-0.3$
$0.5y$	$.0.5$