√28(√14-√7)-2√98 Нужно упростить
√28*14-√28*7-2√98=√392-√196-2√98=√4*98-14-2√98=2√98-2√98-14=-14
2√7(√2 * √7 - √7) - 14√2 = 2√7 * √7( √2 - 1) - 14√2 = 14√2 -14 -14√2 = -14