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gzena1234567p43cxu
@gzena1234567p43cxu
August 2022
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упростите вырожение-(−8a−2b)(−3a+9b)+(6a+8b)(7a−9b)
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Sontr
1) (-8a-2b)(-3a+9b)
Перемножаем все члены
24а^2-72ab+6ab-18b^2
2) (6a+8b)(7a−9b)
42a^2-54ab+56ab-72b^2
3) Сковдываем 24а^2-72ab+6ab-18b^2+42a^2-54ab+56ab-72b^2=66a^2-66ab+2ab-90b^2=66a^2-64ab-90b^2
Делим на 2: 33а^2-32аb-45b^2
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Answers & Comments
Перемножаем все члены
24а^2-72ab+6ab-18b^2
2) (6a+8b)(7a−9b)
42a^2-54ab+56ab-72b^2
3) Сковдываем 24а^2-72ab+6ab-18b^2+42a^2-54ab+56ab-72b^2=66a^2-66ab+2ab-90b^2=66a^2-64ab-90b^2
Делим на 2: 33а^2-32аb-45b^2