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### Grade 7 - Mathematics4.51 Special Products and Expansions Review Test

 Q 1: Divide (75x5 + 25x4 - 50x3) by 25x2.5x4 + 6x2 - 8x3x3 + x2 - 2x2x3 + 4x2 - 23x4 + x2 - 2x Q 2: 9x3-6x2+8x+9, find the value of given expression when x=2.43404641 Q 3: Divide [(9a)3-(8b)3] by (9a-8b).81a2+72ab+64b281a2-72ab+64b281a3+72ab+64b3 Q 4: (a-b)2 = a2 - 2ab + b2, is this statement is true for any pair of real numbers?TrueFalse Q 5: (9x2+4).(x-2) = _____?9x3-18x2+4x-89x3-18x2-4x+89x3+18x2+4x-8 Q 6: 16x2 - 81y2 = _____?(4x-9y)(4x-9y)(4x+9y)(4x-9y)(4x+9y)(4x+9y) Q 7: (a+3b)2 - 16b2 = _____?(a+7b)(a-b)(a+4b)(a-4b)(a+7b)(a-7b) Q 8: 19(7x+6y+7z) = _____?Answer: Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!
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