[tex](2x-3) (x + 5)-2 (x + 1) (-3x-5)=\\\\=2x^2+10x-3x-15-2(-3x^2-5x-3x-5)= \\\\=2x^2+7x-15+6x^2+10x+6x+10=8x^2+23x-5\\\\x=-3,5\\\\8x^2+23x-5=8 (3,5)^2+23*3,5-5 =8*12,25+80,5-5=98+80,5-5=173,5[/tex]
