ML AGGARWAL CLASS 8 CHAPTER 11 Factorisation Exercise 11.5

 Exercise 11.5

Solution 1

Sol :
(i) (35x+28)÷(5x+4)

35x+285x+4

7(5x+4)5x+4

7


(ii) 7p2q2(9r21)÷63pq(r3)

⇒ 7p2q2(9r27)63pq(r3)

⇒ 7p2q2q(r3)63pq(x3)

⇒ pq




Solution 2

Sol :
(i) 6(2x+7)(5x3)÷3(5x3)

6(2x+7)(5x3)3(5x3)

⇒2(2 x+7)

4x+14


(ii) 33pq(p+3)(2q5)÷11p(2q5)

38pq(p+3)(2q8)11pq(2q5)

⇒3(p+3)

⇒3p+9


Solution 3

Sol :
(i) (7x363x)÷7(x3)

⇒ 7x36x7(x3)

7x(x29)7(x3)

x(x232)x3

x(x+3)(x3)(x3)

⇒x(x+3)

x2+3x


(ii) (3p2+17p+10)÷(p+5)

3p2+17p+10p+5

3p2+15p+2p+10p+5

3P(p+5)+2(p+5)p+5

(p+5)(3p+2)(p+5)

⇒ 3p+2


(iii) 10xy(14y2+43y21)÷5x(7y3)

⇒ 10y(14y2+43y21)5x(7y3)

2y(14y26y+49y21)7y3

2y(2y(7y3)+7(7y3))7y3

2y(7y3)(2y+7)(7y3)

⇒2y(2 y+7)


(iv) 12pqr(6p213pq+6q2)÷6pq(2p3q)

⇒ 12pqr(6p213pq+6q2)6pq(2p3q)

⇒ 2r(6p29pq4pq+6q2)2p3q

⇒ 2r(3p(2p3q)2q(2p3q))2p3q

⇒ 2r(2p3q)(3p2q)(2p3q)

⇒2(3 p-2 q)

Comments

Popular posts from this blog

ML Aggarwal Solution Class 10 Chapter 15 Circles Exercise 15.1

ML Aggarwal Solution Class 9 Chapter 20 Statistics Exercise 20.2

ML Aggarwal Solution Class 9 Chapter 3 Expansions Exercise 3.2