-x( x +99)+ ( x+10)( x-10) при х=8/9
Sasha1230981
2
04.09.2020 13:51
74
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2
-12.
Пошаговое объяснение:
Найти значения выражения:
-x(x+99)+(x+10)(x-10)= при х= -8/9
Раскрыть скобки:
= -х² - 99х + х² - 100=
= -99х - 100=
= -99 * (-8/9) - 100=
=88 - 100= -12.