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leramotugulina
@leramotugulina
July 2022
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Помогите пожалуйста. Упростите: (d-c)(b-5c)+(b-6c)^2; 4(a+b)^2-2(a-b)^2;
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ВикаВикторовна
Verified answer
(b-c)(b-5c)+(b-6c)² = b²-5bc-bc+5c²+b²-12bc+36c² = 2b²-8bc+41c²
4(a+b)²-2(a-b)² = 4a²+8ab+4b²-2a²+4ab-2b²=2a²+12ab+2b²
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Verified answer
(b-c)(b-5c)+(b-6c)² = b²-5bc-bc+5c²+b²-12bc+36c² = 2b²-8bc+41c²4(a+b)²-2(a-b)² = 4a²+8ab+4b²-2a²+4ab-2b²=2a²+12ab+2b²