Question

(3x+2)² + (4x-3)² ≤ (5x-1)²​

Answer 1

$(3x+2)^2+(4x-3)^2\leq (5x-1)^2\\\\9x^2+12x+4+16x^2-24x+9\leq25x^2-10x+1\\\\25x^2-12x+13-25x^2+10x-1\leq 0\\\\12-2x\leq0\\\\2(6-x)\leq 0\quad|:2\\\\6-x\leq0\\\\x\geq 6$

Ответ: $x\in[6;\ +\infty)$