ii_chet_7_klass_algebra_sor№_4_obsheobr_original_1_variant

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klass _______ imya, familiya _________________________data _____ algebra 7 klass sor №4 1-variant 1. zapishite v vide kuba summi dvuchlena: (5 ballov) 𝑥3 + 9𝑥2𝑦 + 27𝑥𝑦2 + 27𝑦3 otvet: _______________________________________________ 2. uprostite virajenie: (5 ballov) (2𝑎 + 3𝑏)3 − (2𝑎 − 3𝑏)3 otvet: _______________________________________________ 3. razlojite na mnojiteli mnogochlen. (5 ballov) 15𝑎2 + 20𝑎𝑏 + 3𝑎𝑐 + 4𝑏𝑐 otvet: _______________________________________________ 4. reshite uravnenie: (5 ballov) (3 + 4𝑥)(9 − 12𝑥 + 16𝑥2) = 64𝑥3 + 9𝑥 otvet: _______________________________________________ 5. vichislite: (5 ballov) 673 + 473 67 + 47 − 67 ∙ 47 otvet: _______________________________________________ summarniy ball uchenika: ____________ proveril prepodavatel: _________________________ ________(podpis) kriterii otsenki № ball otvet deskriptor 1 5 (𝑥 + 3𝑦)3 1) esli privodit k formule 𝑥3 + 9𝑥2𝑦 + 27𝑥𝑦2 + 27𝑦3 = 𝑥3 + 3(𝑥)23𝑦 + 3𝑥(3𝑦)2 + (3𝑦)3 , 2 balla; 2)esli napishet 𝑥3 + 3(𝑥)23𝑦 + 3𝑥(3𝑦)2 + (3𝑦)3 = (𝑥 + 3𝑦)3 v …

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2 − 67 ∙ 47 = (67 − 47)2 = 400 , 5 ballov. summa ballov: 25

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klass _______ imya, familiya _________________________data _____ algebra 7 klass sor №4 1-variant 1. zapishite v vide kuba summi dvuchlena: (5 ballov) 𝑥3 + 9𝑥2𝑦 + 27𝑥𝑦2 + 27𝑦3 otvet: _______________________________________________ 2. uprostite virajenie: (5 ballov) (2𝑎 + 3𝑏)3 − (2𝑎 − 3𝑏)3 otvet: _______________________________________________ 3. razlojite na mnojiteli mnogochlen. (5 ballov) 15𝑎2 + 20𝑎𝑏 + 3𝑎𝑐 + 4𝑏𝑐 otvet: _______________________________________________ 4. reshite uravnenie: (5 ballov) (3 + 4𝑥)(9 − 12𝑥 + 16𝑥2) = 64𝑥3 + 9𝑥 otvet: _______________________________________________ 5. vichislite: (5 ballov) 673 + 473 67 + 47 − 67 ∙ 47 otvet: _______________________________________________ summarniy ball uchenika: ____________ proveril prepodavatel: _________________________ ______...

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