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Mathematics 8 Online
OpenStudy (anonymous):

A classmate is having trouble factoring special-case polynomials. Point out the errors she has made, and write a brief suggestion to help her with similar problems. a. 4a2 - 100 = (2a - 10)(2a 2 10) = (2a - 10)2 b. 81m4 + 72m2n + 16n2 = (9m2 + 8n)(9m2 + 8n) = (9m2 + 8n)2 c. a10b4 - 16 = (a5b2 - 16) = (a5b2 - 4)(a5b2 + 4) d. 4 d2 + 36d + 81 = (2d + 9)(2d - 9)

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