Question

(2х-5)(2х+5)-(2х+3)^2 ≤2

Answer 1

$(2x-5)(2x+5)-(2x+3)^{2} leq 2 \ 4 x^{2} -25-(4 x^{2} +9+12x) leq 2 \ 4 x^{2} -25-4 x^{2} -9-12x leq 2 \ -12x-9-25 leq 2 \ -12x-34 leq 2 \ -12x leq 2+34 \ -12x leq 36 \ x geq -3$

x∈$[-3;+infty )$