7_klass_algebra_sor_№6_obsheobr_2_variant

klass _______ imya, familiya _____________________ data _____ voprosi po algebree dlya 7-go klassa sor № 6 2-variant 1. sokratite algebraicheskie drobi: (8 ballov) 1) 3𝑥4𝑦 12𝑥2𝑦2 = 2) 2𝑎+𝑏 4𝑎2−𝑏2 = 3) 2𝑥−2𝑦 4(𝑥−𝑦)2 = otvet: _______________________________________________ 2. vipolnite deystviya: (8 ballov) 1) 1 𝑥+𝑦 + 3𝑥+2𝑦 𝑥2−𝑦2 + 1 𝑥−𝑦 = 2) 2𝑎 − 𝑎−1 𝑎+1 + 3 = otvet: _______________________________________________ 3. vipolnite deystviya: (10 ballov) 𝑎3 − 𝑏3 𝑎2 − 𝑎𝑏 + 𝑏2 ∙ 𝑎3 + 𝑏3 𝑎2 + 𝑎𝑏 + 𝑏2 ∶ 7𝑎2 − 7𝑏2 7𝑎𝑏 otvet: _______________________________________________ 4. 4. reshite uravnenie: (6 ballov) 15𝑥 − 19 + 4(3 − 𝑥) = 21 − 3(7𝑥 + 2) otvet: _______________________________________________ 5. reshite zadachu s pomoshyu uravneniya: (8 ballov) …

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