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SUPER
Mathematics
8th
grade
Post-assessment | CBSE | G8 | C.12 Factorisation
13 questions
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- 1. Multiple Choice
The factorisation of 12a2b+15ab2 gives:
3ab(4ab+5)
3ab(4a+5b)
3a(4a+5b)
3b(4a + 5b)
- 2. Multiple Choice
The factors of 4y2 – 12y + 9 is:
(2y+3)2
(2y-3)2
(2y-3)(2y+3)
None of the above
- 3. Multiple Choice
The common factor of a3b3 and ab2 is:
a2b2
ab2
a2b
ab
- 4. Multiple Choice
The common factor of 24a3b4, 36a4c4 and 48a3b2c is:
12a3
24a3
36a3
48a3
- 5. Multiple Choice
The factors of xyz are:
x
y
z
All of the above
- 6. Open EndedUpload answer type
Express the following as in the form of (a+b)(a-b)
A) a2 – 64
B) 20a2 – 45b2
C) 32x2y2 – 8
D) x2 – 2xy + y2 – z2
- 7. Open EndedUpload answer type
For a = 3, simplify a2 + 5a + 4 and a2 – 5a
- 8. Open EndedUpload answer type
Verify whether the following equations are correct. Rewrite the incorrect equations correctly.
A) (a + 6)2 = a2 + 12a + 36
B) (2a)2 + 5a = 4a + 5a
- 9. Open EndedUpload answer type
Find the common factors of the following:
A) 6 xyz, 24 xy2 and 12 x2y
B) 3x2 y3, 10x3 y2 and 6x2 y2 z
- 10. Open EndedUpload answer type
Factorize x2 + 6x – 16
- 11. Open EndedUpload answer type
Solve for (4x2 – 100) ÷ 6(x + 5)
- 12. Open EndedUpload answer type
Factorise:
A) 14m5n4p2 – 42m7n3p7 – 70m6n4p3
B) 2a2(b2 – c2) + b2(2c2 – 2a2) + 2c2(a2 – b2)
- 13. Open EndedUpload answer type
The area of a rectangle is 6a2 + 36a and 36a width. Find the length of the rectangle.
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