Вопрос школьника по предмету Алгебра
Найди значение алгебраического выражения
10ab(11a2−b2)+11ab(b2−10a2)
при a=10,b=−5
Ответ учителя по предмету Алгебра
10ab(11a²
−b²
)+11ab(b²
−10a²
)=ab(10(11a²-b²)+11(b²-10a²))=ab(110a²-10b²+11b²-110a²)=abb²=ab³,
если а=10, b=-5, то 10·(-5)³=10·(-5³)=-10·125=-1250.
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