Решите уравнения: х²+14=9 х; х²+10=7 х; х²-6 х=16; х²-5 х=14.

X²-9x+14=0

x1 + x2 = 9;

x1*x2 = 14;

x1 = 2;

x2 = 7;

x²-7x+10=0;

x1 + x2 = 7;

x1*x2 = 10;

x1 = 2;

x2 = 5;

x²-6x-16=0;

D = (-6) ² - 4 * 1 * (-16) = 36 + 64 = 100

x1 = (6 - 10) / 2 = - 2;

x2 = (6 + 10) / 2 = 8;

x²-5x-14=0;

x1 + x2 = 5;

x1*x2 = - 14;

x1 = - 2;

x2 = 7;