Question

(x+4)*(x-2)-(x+5)*(x+3)⩽-8x

Answer 1

$(x+4)(x-2)-(x+5)(x+3) leq -8x\x^2+4x-2x-8-(x^2+5x+3x+15) leq -8x\x^2+2x-8-x^2-8x-15 leq -8x\2x-23 leq 0\2x leq 23\x leq 23/2\x leq 11,5\xin(-infty;11,5]$