Решите уравнения: -1+100x^2=0 14x^2+7x=0 2x^2-7x+6=0 - вопрос №70013571100201427022760 от ilchumakovsky1 03.03.2021 00:18

Question

Алгебра: Решите уравнения: -1+100x^2=0 14x^2+7x=0 2x^2-7x+6=0

ilchumakovsky1 · Answer

100x^2 - 1 = 0 100x^2 = 1x^2 = 1/100x1 = - 1/10 = - 0,1x2 = 1/10 = 0,114x^2 + 7x = 0 2x^2 + x = 0 x (2x + 1) = 0 x = 0 2x + 1 = 0 == 2x = - 1 == x = - 0,52x^2 - 7x + 6 = 0 D = 49 - 48 = 1x1 = ( 7 + 1)/4 = 8/4 = 2x2 = ( 7 -  1)/4 = 3/2 = 1,5...