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9.7 Special Factors

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a. 0 y y y-4y Ans:________________ (y+4)(y-4)

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b. 0 5m m-30m Ans:________________ (5m+6)(5m-6)

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c. -2 x2x2 – 49y 2 0 x x +7y -7y 7xy-7xy Ans:_________________ -2(x+7y)(x-7y)

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d. 2 4 – 9n n -3n 6n-6n Ans:_________________ 2(2+3n)(2-3n)

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e. x2x2 – 4y 2 0 x x +2y -2y 2xy-2xy Ans:_________________ (x+2y)(x-2y)

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f. 16 a2a2 – 4b 2 0 a a +2b -2b 2ab-2ab Ans:_________________ 16(a+2b)(a-2b)

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g. -12n n n -6 -6n Ans:________________ (n-6) 2

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h. 12n n n +6 6n Ans:________________ (n+6) 2

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i. -12x 3x -2 -6x Ans:________________ (3x-2) 2

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j. 4xy 2x +y 2xy+2xy Ans:________________ (2x+y) 2

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k. 2 y2y2 -10y y y y -5 -5y Ans:_____________ 2(y-5) 2

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l. 3 x2x2 +2xy+y 2 2xy x x +y xy+xy Ans:_____________ 3(x+y) 2

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