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Grade 8 - Mathematics
7.51 Polynomials Review Test

Q 1: If x-y = 3 and xy = 18, find the value of x2+y2.
45
47
49
43

Q 2: If x - 1/x = 3, find the value of x2+1/x2 and x4+1/x4.
113
117
115
119

Q 3: Find the product (7x+2y)(7x-2y).
None of these
49x2-2y2
49x2+4y2
49x2-4y2

Q 4: (6x2+7x-7)(-5x) = _____?
-30x3-35x2+35x
None of these
-30x3+35x2+35x
30x3-35x2+35x

Q 5: (6a-7b)(6a+7b) = _____?
(6a)2+(7b)2
None of these
(6a)2-(7b)2

Q 6: Expand (5x+2y)2.
None of these
25x2-20xy+4y2
25x2+20xy+2y2
25x2+20xy+4y2

Q 7: Find the product of (x-3)(x-5)(x+7).
None of these
x3-x2-41x+105
x3-x2-41x+105
x3-x2-41x+105

Q 8: Divide (8a2b - 16ab2 + 36ab) by 4ab.
2a - 4ab - 9
2a + 4b - 9
2a - 4b + 9
2a - 4b - 9

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Question 10: This question is available to subscribers only!


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