4(3-0,5х)+11,5х=50 х²-3х+12=0 2х²+10х=0 20-5х²=0 - вопрос №5344365430511550312021002050 от vinogradka009 04.01.2023 18:57

Question

Математика: 4(3-0,5х)+11,5х=50 х²-3х+12=0 2х²+10х=0 20-5х²=0

vinogradka009 · Answer

4(3-0,5х)+11,5х=5012-2х+11,5х = 509,5х = 50-129,5х=38х = 38:2,5х = 15,2х²-3х+12=0D = 9-48 = -39корней нет2х²+10х=0х*(2х+10) = 0х = 02х+10 = 02х = -10х = -520-5х²=0-5х² = -20х² = 4х = 2х = -2...