х²-(9-х)²

July 2022 1 11 Report

х²-(9-х)² <-2х
х²<(25-х)²+25х
Решите пожалуйста!

mikael2 Х²-(9-х)² <-2х x²-(81-18x+x²) <-2х x²-81+18x-x²+2x<0
20x<81 x<4.05

х²<(25-х)²+25х x²<625-50x+x²+25x
625-25x>0 25x<625 x<25

5 votes Thanks 6