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Worksheet for Class 8 Mathematics Chapter 9 Algebraic Expressions and Identities
Class 8 Mathematics students should refer to the following printable worksheet in Pdf for Chapter 9 Algebraic Expressions and Identities in Class 8. This test paper with questions and answers for Class 8 will be very useful for exams and help you to score good marks
Class 8 Mathematics Worksheet for Chapter 9 Algebraic Expressions and Identities
Question. Find the degree of the polynomial 5x3 - 6x3y + 4y2 - 8.
(A) 3
(B) 4
(C) 2
(D) 6
Answer : B
Question. What is the measure of the third side of a triangle given that its two sides are a2 - 2a + 1 and 3a2 - Sa + 3 and has a perimeter 6a2 - 4a + 9?
(A) 2a2 - 3a - 5
(B) 2a2 + 3a - 5
(C) 2a2 + 3a + 5
(D) 2a2 - 3a + 5
Answer : C
Question. Two sides of a rectangle are (3p + 5q) units and (Sp- 7q) units. What is its area in sq. units?
(A) 15p2 + 4pq - 35q2
(B) 15p2 - 4pq + 35q2
(C) 15p2 + 14pq + 35q2
(D) 15p2 - 4pq - 35q2
Answer : A
Question. The difference of x4 + 2x2 - 3x + 7 and another polynomial is x3 + x2 + x - 1. What is the other polynomial ?
(A) x4 - x3 + x2 - 4x + 8
(B) x3 + x2 - 4x + 8
(C) x4 - x3 + x2 + 4x - 8
(D) x4 - x3 - x2 + 4x - 8
Answer : A
Question. Find the side of a square field of area
Answer : D
Question. Given that x - 1/x = 5 , find the value of x2 + 1/x2
(A) - 27
(B) 23
(C) 27
(D) - 23
Answer : C
Question. Find the missing term in the following expression.
(3x/4 - 4y/3)2 = 9x2/16 +....... + 16y2/9
(A) 2xy
(B) -2xy
(C) 12xy
(D) -12xy
Answer : B
Question. The sum of two expressions is x3 -x2 + 3x- 2. If one of them is x2 + 5x- 6, what is the other ?
(A) x3 - 2x2 - 2x - 4
(B) x3 + 3x2 - 2x + 4
(C) x3 - 2x2 - 2x + 4
(D) -x3 - 2x2 + 2x - 4
Answer : C
Question. If (3x - 4)(5x + 7) = 15x2 - ax- 28, what is the value of 'a'?
(A) 1
(B) -1
(C) - 2
(D) 2
Answer : B
Question. Find the product of (x2 + 3x + 5) and (x 2 -1).
(A) x4 + 3x3 - 4x2 - 3x - 5
(B) x4 + 3x3 + 4x2 - 3x - 5
(C) x4 + 3x3 + 4x2 + 3x - 5
(D) x4 - 3x3 - 4x2 + 3x - 5
Answer : B
Question. What is the difference obtained when x3 - xy2 + 5x2y - y3 is subtracted from - y3 - 6x2y - xy2 + x3 ?
(A) 2y3 - 8x2y + 3xy2- 2x3
(B) 2x3 - 2xy2 - x 2y - 2y3
(C) - 11x 2y
(D) 11x2y
Answer : C
Question. If 3x- 7y = 10 and xy = - 1, find the value of 9x2 + 49y2
(A) 58
(B) 142
(C) 1 04
(D) -104
Answer : A
Question. What is the va1ue of 7.83 x 7.83 - 1.17 x 1.17/6.66 ?
(A) 9
(B) 6.66
(C) 1.176
(D) -9
Answer : A
Question. What must be added to x3 + 3x - 8 to get 3x3 + x 2 + 6 ?
(A) 2x3 + x2 - 3x + 14
(B) 2x2 + x2 + 14
(C) 2x3 + x2 - 6x -14
(D) -2x3 - x2 + 6x - 14
Answer : A
Question. If x2 + 1/x2 = 79, what is the value of X + 1/x ?
(A) 7
(B) 9
(C) J79
(D) -9
Answer : B
Question. Evaluate the expression 81p2 + 16q2 -72pq when P = 2/3 and q = 3/4.
(A) -16
(B) 9
(C) -9
(D) 16
Answer : B
Question. The area A, of a solid is given by the formula A = πr2 + 2n rh + πrl. Find the value of A given that n = 3.142, r = 10, h = 3 and l = 4.
(A) 629
(B) 628.4
(C) 630
(D) 631
Answer : B
Question. If the perimeter of the figure given is 57 em, find the perimeter of the triangle in the figure.
(A) 30 cm
(B) 45 cm
(C) 39 cm
(D) 3 cm
Answer : B
Q1 The degree of the expression 2x-4xy2+5x2y3
Q2 The number of terms in a binomial is
Q3 What must be subtracted from 2x2-3x+4 to get x2 +2x-1?
Q4 The product of 3x2 and -5xy3 is
Q5 The product of (x+3) and (2x-1) is
Q6 The product of (x+y) (x-y) (x2+y2) is
Q7 What will be the remainder when 3x2-2x+1 is divided by x+5?
Q8 What will be the remainder when x6-3x2-10 is divided by x3-1?
Q9 What must be added to y3-y2-3y-2 to get y2-5y+6?
Q9 Find the value of <a> if (2x-5) (x+3)=2x2+x+a?
Q10 When (3y+1)(2y-3)=6y2+ay-3, what will be the value of (a)?
Q11 If x=3, y=2, then (x-y)(x2+xy+y2) is
Q12 Add (i) 3m2+8m-4 and 6m2-m+7 (ii) a2+2ab and -3ab-d2
Q13 Simplify (i) 4x-(-8y-3x) (ii)-(49-a2)-9a2
Q14 Subtract 72pq-30q2-15p2 from 30p2+40q2-12pq ?
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CBSE Class 8 Mathematics Chapter 9 Algebraic Expressions and Identities Worksheet
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Worksheet for Mathematics CBSE Class 8 Chapter 9 Algebraic Expressions and Identities
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Chapter 9 Algebraic Expressions and Identities worksheet Mathematics CBSE Class 8
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Chapter 9 Algebraic Expressions and Identities CBSE Class 8 Mathematics Worksheet
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Worksheet for CBSE Mathematics Class 8 Chapter 9 Algebraic Expressions and Identities
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