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Warspirit
@Warspirit
October 2021
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Помогите , пожалуйста , очень нужно...
2) (5-0,9х)(0,9х+5)-10+0,81х^2;
4) (0,6-х)(х+0,6) - (2-х)(х+2);
Заранее спасибо.
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Хильмилли
(5-0,9х)(5+0,9х)-10+0,81х^2=25-0,81x^2-10+0,81x^2=15
(0,6-х)(х+0,6) - (2-х)(х+2)=
(0,6-х)(0,6+x) - (2-х)(2+х)=0,36-x^2-(4-x^2)=0,36-x^2-4+x^2=-3,64;
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Answers & Comments
(0,6-х)(х+0,6) - (2-х)(х+2)=(0,6-х)(0,6+x) - (2-х)(2+х)=0,36-x^2-(4-x^2)=0,36-x^2-4+x^2=-3,64;