ii_chet_7_klass_algebra_sor№_4_obsheobr_original_2_variant

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klass _______ imya, familiya _________________________data _____ algebra 7 klass sor №4 2-variant 1.zapishite v vide kuba summi dvuchlena: (5 ballov) 64𝑥3 − 48𝑥2 + 12𝑥 − 1 otvet: _______________________________________________ 2. uprostite virajenie: (5 ballov) (2𝑥 − 3)3 − (2𝑥 + 3)3 otvet: _______________________________________________ 3.razlojite na mnojiteli mnogochlen. (5 ballov) 8𝑎2 + 12𝑎𝑏 + 10𝑎𝑐 + 15𝑏𝑐 otvet: _______________________________________________ 4. reshite uravnenie: (5 ballov) (2𝑥 − 3)(9 + 6𝑥 + 4𝑥2) = 8𝑥3 + 27𝑥 otvet: _______________________________________________ 5. vichislite: (5 ballov) 513 − 493 51 − 49 + 51 ∙ 49 otvet: _______________________________________________ summarniy ball uchenika: ____________ proveril prepodavatel: _________________________ ________(podpis) kriterii otsenki № ball otvet deskriptor 1 5 (4𝑥 − 1)3 1) esli privodit k formule 64𝑥3 − 48𝑥2 + 12𝑥 − 1 = (4𝑥)3 + 3(4𝑥)2 ∙ 1 + 3 ∙ 4𝑥 ∙ (1)2 − (1)3 , 2 balla; 2)esli napishet (4𝑥)3 + 3(4𝑥)2 ∙ 1 + 3 ∙ …

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∙ 49 + 492 + 51 ∙ 49 = (51 + 49)2 = 10000 , 5 ballov. summa ballov: 25

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klass _______ imya, familiya _________________________data _____ algebra 7 klass sor №4 2-variant 1.zapishite v vide kuba summi dvuchlena: (5 ballov) 64𝑥3 − 48𝑥2 + 12𝑥 − 1 otvet: _______________________________________________ 2. uprostite virajenie: (5 ballov) (2𝑥 − 3)3 − (2𝑥 + 3)3 otvet: _______________________________________________ 3.razlojite na mnojiteli mnogochlen. (5 ballov) 8𝑎2 + 12𝑎𝑏 + 10𝑎𝑐 + 15𝑏𝑐 otvet: _______________________________________________ 4. reshite uravnenie: (5 ballov) (2𝑥 − 3)(9 + 6𝑥 + 4𝑥2) = 8𝑥3 + 27𝑥 otvet: _______________________________________________ 5. vichislite: (5 ballov) 513 − 493 51 − 49 + 51 ∙ 49 otvet: _______________________________________________ summarniy ball uchenika: ____________ proveril prepodavatel: _________________________ ________(podpi...

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