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Valerya231
@Valerya231
July 2022
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Известно, что a-b=10, a•b=7. Найдите значение выражения (a+b)².
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Universalka
Verified answer
A - b = 10
(a - b)² = 10²
a² - 2ab + b² = 100
a² + b² = 100 + 2ab = 100 + 2 * 7 = 100 + 14 = 114
(a + b)² = a² + 2ab + b² = 114 + 2 * 7 = 114 + 14 = 128
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Verified answer
A - b = 10(a - b)² = 10²
a² - 2ab + b² = 100
a² + b² = 100 + 2ab = 100 + 2 * 7 = 100 + 14 = 114
(a + b)² = a² + 2ab + b² = 114 + 2 * 7 = 114 + 14 = 128