Во вложениях..............

Question

Во вложениях..............

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Answer 1

х²-81______    =  (х-9)(х+9)           =  (х-9)(х+9)  =х-9      = -8-9___   =     -17  =2,125

х³+18х²+81х         х(х²+18х+81)        х (х+9)²        х(х+9)     -8(-8+9)       -8