# Algebraic Expressions And Identities : Exercise 9.2 (Mathematics NCERT Class 8th)

**Q.1 Find the product of the following pairs of monomials. **

(i) 4, 7*p* (ii) â€“ 4*p*, 7*p* (iii) â€“ 4*p*, 7*pq* (iv) 4, â€“ 3*p *

(v) 4*p*, 0

** Sol.** The product of given pair of monomials are as follows:

(i)

(ii)

(iii)

(iv)

(v)

**Q.2 Find the areas of rectangles with the following pairs of monomials as their lengths and breadths respectively.**

** Sol.** We know that, area of rectangle = length x breadth

For: area =

For: area =

For: area =

For: area =

For: area =

**Q.3 Complete the table of products.**

First monomial â†’__
Second monomialâ†“ |
||||||

... | ... | ... | ... | ... | ||

... | ... | ... | ... | ... | ||

... | ... | ... | ... | ... | ... | |

... | ... | ... | ... | ... | ... | |

... | ... | ... | ... | ... | ... | |

... | ... | ... | ... | ... | ... |

** Sol.** The complete table is as shown below:

First monomial â†’__
Second monomialâ†“ |
||||||

**Q.4 Obtain the volume of rectangular boxes with the following length, breadth and height respectively. **

(i) (ii) (iii) (iv)

** Sol.** We know that, volume of rectangle = length x breadth x height

(i)

Volume =

(ii)

Volume =

(iii)

Volume =

(iv)

Volume =

**Q.5 Obtain the product of **

(i) (ii) (iii)

(iv) (v)

** Sol.** The product are as follows:

(i)

(ii)

(iii)

(iv)

(v)