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Mathematics
OpenStudy (anonymous):

what is the factored form of these expressions? 1. d2 + 18d + 81 a. (d + 9)(d – 9) b. (d + 9)2 c. (d – 81)(d – 1) d. (d – 9)2 2. d2 + 22d + 121 a. (d + 11)2 b. (d – 11)2 c. (d – 11)(d + 11) d. (d – 121)(d – 1) 3. r2 – 49 a. (r – 7)(r + 7) b. (r + 7)(r + 7) c. (r – 7)(r – 7) d.(r – 7)(r + 9)

OpenStudy (anonymous):

1.b 2.a 3.a

OpenStudy (anonymous):

B A A

OpenStudy (anonymous):

thanks much:)

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