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Q.

Carry out the following divisions. 

(i) 28x 4 ÷ 56x 

(ii) –36y 3 ÷ 9y 2 

(iii) 66pq2r 3 ÷ 11qr

(iv) 34x 3y 3z 3 ÷ 51xy2z

(v) 12a 8b 8 ÷ (– 6a 6b 4 )

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Detailed Solution

We know that, Factorization means finding out the factors of the given algebraic expression

(i) 28x 4 ÷ 56x : 

let 28x 4,56x can be written as 

28x 4 = 2 × 2 × 7 × x × x  × x  × x 

 56x = 2 × 2 × 2 × 7 × x

Thus, we get 

28x 4 ÷ 56x = 2 × 2 × 7 × x × x  × x  × x /  2 × 2 × 2 × 7 × x

= x3/2

(ii) –36y 3 ÷ 9y 2 :

let –36y 3, 9y 2 can be written as 

–36y 3-× 2 × 3 × 3 × y × y  × y

9y 2 = 3 × 3 × y × y 

Thus, we get 

 –36y 3 ÷ 9y 2 =  -× 2 × 3 × 3 × y × y  × y /  3 × 3 × y × y 

- 4y

(iii) 66pq2r 3 ÷ 11qr:

let  66pq2r 3, 11qr can be written as 

 66pq2r 3 = 2 × 3 × 11 × p × q× q  × r × r × r

11qr = 11 × q × r × r 

Thus, we get 

 66pq2r 3 ÷ 11qr2 =  2 × 3 × 11 × p × q× q  × r × r × r /  11 × q × r × r 

= 6pqr

(iv) 34x 3y 3z 3 ÷ 51xy2z:

let   34x 3y 3z 3 , 51xy2z 3   can be written as 

 34x 3y 3z 3  = 2 × 17 × x × x × x× y  × y × y × z × z × z

51xy2z 3   = 3 × 17 × x × y × y × z × z × z

Thus, we get 

34x 3y 3z 3 ÷ 51xy2z 3 =  2 × 17 × x × x × x× y  × y × y × z × z × z /   3 × 17 × x × y × y × z × z × z

= 2x2y/3

(v) 12a 8b 8 ÷ (– 6a 6b 4 ):

let    12a 8b 8 , – 6a 6b 4 can be written as 

 12a 8b 8  = 2 × 2 × 3 × a 8 × b 8

- 6a 6b 4   =  - 2 × 3  × a 6 × b 

Thus, we get 

12a 8b 8 ÷ (- 6a 6b 4 ) =  2 × 2 × 3 × a 8 × b 8 /   - 2 × 3  × a 6 × b

=- 2a2b 4

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