Question

решите неравенства даю 30 баллов​

Answer 1

(x - 3)(x + 4) < 0

(x - 3) * x + (x - 3) * 4 < 0

x * x - 3x + 4x - 12 < 0

x * x + x - 12 < 0

x < 3 т.к. 3 * 3 + 3 - 12 = 0