Решите уровнение 9×2+3x-2=0 5×2+10x=0 9×2-4=0 - вопрос №698766292320521009240276022340 от chapaev1981 03.05.2021 08:58

Question

Математика: Решите уровнение 9×2+3x-2=0 5×2+10x=0 9×2-4=0 x2-7x+6=0 2×2+3x+4=0

chapaev1981 · Answer

9x²+3x-2=0D = 9+4*9*2 = 81x1 = (-3-9):9 = -12/9 = -4/3 = -1 1/3x2 = (-3+9):9 = 6*9 = 2/35x²+10x = 05x(x+2) = 0x1 = 0x2 = -29x²-4 = 09x² = 4x² = 4/9x = ±2/3x²-7x+6 = 0D = 49-4*6 = 49*24 = 25x1 = (7-5):2 = 2:2 = 1x2 = (7+5):2 = 12:2 = 62x²+3x+4 = 0D = 9-4*2*4 = 9-32 = -23 0 - корней нет....