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#### Algebra Book Back Questions

8th Standard EM

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Maths

Time : 00:45:00 Hrs
Total Marks : 30
4 x 1 = 4
1. The product of 7p3 and (2p2)2 is

(a)

14p12

(b)

28B7

(c)

9p7

(d)

11p12

2. The missing terms in the product -3m3n X9(_)m4n3 are

(a)

mn2,27

(b)

m2n,27

(c)

m2n2,-27

(d)

mn2,-27

3. If the area of a square is 36x4y2then, its side is______

(a)

6x4y2

(b)

8x2y2

(c)

6x2y2

(d)

-6x2y

4. If the area of a rectangular land is(a2-b2)− sq.units whose breadth is()ab− then, its length is__________

(a)

a-b

(b)

a+b

(c)

a2-b

(d)

(a+b)2

5. 4 x 1 = 4
6. $\cfrac { { I }^{ 4 }{ m }^{ 5 }{ n }^{ (\_) } }{ 2lm^{ (3) }{ n }^{ 6 } } =\cfrac { { l }^{ 3 }{ m }^{ 2 }n }{ 2 }$

()

$\cfrac { { I }^{ 4 }{ m }^{ 5 }{ n }^{ (7) } }{ 2lm^{ (3) }{ n }^{ 6 } } =\cfrac { { l }^{ 3 }{ m }^{ 2 }n }{ 2 }$

7. $\cfrac { { 42a }^{ 4 }{ b }^{ 5 }\left( \_ \right) }{ { 6a }^{ 4 }{ b }^{ 2 } } =\left( \_ \right) { b }^{ 3 }{ c }^{ 2 }$

()

$\cfrac { { 42a }^{ 4 }{ b }^{ 5 }\left( c^2 \right) }{ { 6a }^{ 4 }{ b }^{ 2 } } =\left( 7 \right) { b }^{ 3 }{ c }^{ 2 }$

8. Expand the following
(3 - a)2=________

()

(3 - a)2 =32-2(3) (a) +a2= 9 - 6a + a2

9. Expand the following
(62-x2)=_______

()

(62-x2) = (6+x)(6-x)

10. 2 x 1 = 2
11. 8x3y÷4x2=2xy

(a) True
(b) False
12. 7ab3÷14ab=2b2

(a) True
(b) False
13. 3 x 2 = 6
14. Multiply a monomial by a monomial
6x,4

15. Find the product of the terms
3x2y, −3xy3 ,x2y2

16. Find the product of (m2-n)(5m2n2-n2)

17. 3 x 3 = 9
18. Multiply (3xy +7) by ( −4y )

19. Expand y2-16 using a2−b2 identity

20. Expand: (x+3)(x+5)(x+2)

21. 1 x 5 = 5
22. Factorise:(2x+5)(x-y)+(4y)(x-y)