Решите уровнения : 7-(x+2)2=11-x2

7 -(х+2)² = 11-х²7- (х²+4х+4) = 11-х²7-х²-4х-4 =11-х²3-х²-4х=11-х²-х²-4х+х²=11-3-4х=8х=8: (-4) х=-2проверим:7- (-2+2)² = 11- (-2)²7-0 = 11-47=7