Question

Решите неравенство 25x^2-36>=0

Answer 1

$25x^2-36geq0\ (5x-6)(5x+6)geq0\ left { {{5x-6geq0 atop {5x+6geq0}} right.\ \ left { {{5xgeq6 atop {5xgeq-6}} right.\ \ left { {{xgeqfrac{6}{5} atop {xgeq-frac{6}{5}}} right.\ \ left { {{xgeq1.2 atop {xgeq-1.2}} right.$

Ответ: [1.2; +∞)