B Nirmala Shastry Solutions for Exercise 4: EXERCISE 11.4

Find the value of the following when $a=3, b=4, c=-5$.
$8a-5b$
 

Find the value of the following when $a=3, b=4, c=-5$.
$a-b-c$
 

Find the value of the following when $a=3, b=4, c=-5$.
$a^2+b^2+c^2$
 

Find the value of the following when $a=3, b=4, c=-5$.
$2a-3b-4c$
 

Find the value of the following in its lowest form when $a=3, b=4, c=-5$.
$\frac{a+b+c}{ab}$
 

Find the value of $7x+5y-9z$ for $x=-2, y=-4, z=1$
 

Find the value of $7x+5y-9z$ for $x=3, y=2, z=-3$
 

Find the value of $7x+5y-9z$ for $x=y=z=0$