Algebraic Expressions and Identities MCQ Questions Class 8 Maths Chapter 9
NCERT MCQ Questions for Class 8 Maths Chapter 9 Algebraic Expressions and Identities. Algebraic Expressions and Identities MCQ Questions with Answers from Class 8 Maths.
Algebraic Expressions and Identities MCQ Questions Class 8 Maths Chapter 9
Algebraic Expressions and Identities Multiple Choice Questions with Answers Class 8 Maths Chapter 9 PDF is available.
Question 1:
Identify the coefficient of xy2
xy – 4xy2 – 5x2y
(a) -5
(b) 5
(c) (-4)
(d) 4
Ans:
xy – 4xy2 – 5xy2 = 0
(-4) xy2 = Coefficient (-4) (c)
Question 2:
Identify the coefficient of y2, x – y2 – 2xy2 + 100
(a) 2
(b) -1
(c) 1
(d) -2
Ans:
x – y2 – 2xy2 + 1 = 0
(-1) y2 coefficient (-1) (b)
Question 3:
Subtract 3a – 7ab + 48 from 90 – 6ba + 52
(a) 6a + ab + 4
(b) 6a + 3ab
(c) 6a + 3
(d) 8a + 3ab
Ans:
Question 4:
Substract 3x2 + 4y2 + 6xy from 9x2 + 12y2 + 8xy
(a) 6x2 + 8y2 + 2xy
(b) 3x2 + 5xy
(c) 5y2 + 6xb
(d) 6y2 + 8x2
Ans:
Question 5:
Multiply 3 ab x 4ab =?
(a) 7ab2
(b) 12a2b
(c) 12ab2
(d) 12a2 b2
Ans:
3ab × 4ab = 12a2 b2 (d)
Question 6:
Add 4xy + 6x2y + 8xy2 with 8xy – 6x2y
(a) 3xy2
(b) 5x2 + 2
(c) 8xy + 12
(d) 12xy + 8xy2
Ans:
Question 7:
Product of 7q × 0.
(a) 7q
(b) 7q2
(c) 0
(d) 7
Ans:
7q × 0 = 0 when we multiply any term with zero then we get only 0.
- In case you have missed:- Previous Chapter MCQ Questions
Question 8:
Find the product of P2, q2, p2q2
(a) p4 q4
(b) p3 q3
(c) p2 q2
(d) 0
Ans:
p2 × q2 × p2 × q2
p × p × q × q × p × p × q x q = p4 × q2
= p4q4 (a)
Question 9:
Obtain the volume of rectangle boxes with length, breadth and height are.
6a, 3b2, 7a4
(a) 15a3 b5
(b) 216 b3
(c) 126 a5 b2
(d) 17a2 b3
Ans:
6a × 3b2 × 7a2
= 6 × a × 3 × b × b × 7 × a × a
= 126 a5 b2 (c)
Question 10:
Simplify 4 x (8x – 5) + 4 find its value for x = 2
(a) 90
(b) 92
(c) 82
(d) 84
Ans:
= 4x (8x – 5) + 4 for x = 2
= 4 × 2 (8 × 2 – 5) + 4
= 8 (16 – 5) + 4
= 88 + 4
= 92 (b)
Question 13:
Using identities evaluate 982
(a) 99604
(b) 99607
(c) 99609
(d) 99611
Ans:
982 = (100 – 2)2 = 1002 – 2 × 100 × 2 + 22
= 10000 – 400 + 4
= 99604
Question 14
Using (x + a) (x + b) = x2 + (a + b) x + ab
Find 6.2 × 6.3
(a) 3.906
(b) 39.6
(c) 39.0
(d) 0.396
Ans:
(x + a) (x + b)
= x2 + (a + b) x + ab
= (6 + 0.2) (6 + 0.3)
= 62 + (0.2 + 0.3) × 6 + (0.2 × 0.3)
= 36 + (0.5) × 6 + (0.06)
= 36 + 3 + 0.06
= 39.06 (c)
Question 15:
Simplify (xy + yz)2 – 2xy2z
(a) x3 – y3
(b) x2 y2 + x3 + y3
(c) x2 y2 + y2 z2
(d) x2 y2 – y2 – z2
Ans:
(xy + yz)2 – 2xy2 z
= (xy)2 + 2xy × yz + (yz)2 – 2xy2z
= x2y2 + 2xy2z + y2z2 – 2xy2z
= x2y2 + y2z2 (c)
- In case you have missed:- Next Chapter MCQ Questions
Class 8 ch 9 I have one problem in this question (998)² find using identities
(1000-2)²
(1000)²+(2)²-2×1000×2 ☞(a-b)²
1000000+4-4000
1000004-4000
996004 ✯✯ANSWER