4а-2(а+1)²=4а-2(а²+2а+1)=4а-2а²-4а-2=-2а²-2
при а=√5, то -2 ·(√5)²-2=-2·5-2=-10-2=-12
Copyright © 2024 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
-2*V5-2=-10-2=-12
ответ -12
4а-2(а+1)²=4а-2(а²+2а+1)=4а-2а²-4а-2=-2а²-2
при а=√5, то -2 ·(√5)²-2=-2·5-2=-10-2=-12