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Grade 7 - Mathematics
4.51 Special Products and Expansions Review Test

Q 1: (9x-7y) (9x+7y) = _____?
81x2-49y2
81x2+49y2

Q 2: (15x+2)(9y+3) = _____?
135xy+46x+38y+6
135xy+45x+35y+6
135xy+45x+18y+6

Q 3: (6x2+2y) = (7x2+2b), is this statement is true for any pair of real numbers?
True
False

Q 4: Express 128x2 + 96xy as product of factors.
4x(32x+3y)
3x(32x+4y)
32x(4x+3y)

Q 5: Express 21a+18b as product of factors.
3(7a+6b)
7(3a+6b)
6(7a+3b)

Q 6: Divide [(7a)3-(6b)3] by (7a-6b).
49a2+42ab+36b2
49a2-42ab+36b2
49a3+42ab+36b3

Q 7: Express 21a+28b as product of factors.
3(7a+4b)
4(3a+7b)
7(3a+4b)

Q 8: (7x3+6x2+5x-1)(6x) = _____?
13x3+362-30x-6
42x4+36x3+30x2-6x
42x3+36x2+30x-6
40x3-362+30x-6

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Question 10: This question is available to subscribers only!


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