[tex]a)\\\\ (x-2)^2-3(x+1)=(x+2)(x-2)-2\\\\x^2-4x+4-3x-3=x^2-4-2\\\\x^2-4x -3x -x^2=-4-2-4+3\\\\-7x=-7\ \ |:(-7)\\\\x=1\\\\spr.\\\\(1-2)^2-3(1+1)=(1+2)(1-2)-2\\\\(-1)^2-3*2=3*(-1)-2\\\\1-6=-3-2\\\\-5=-5\\\\L=P[/tex]
[tex]b)\\\\ (3x-4)(3x+4)-9(x-4)^2=-16\\\\9x^2-16-9(x^2-8x+16) =-16\\\\\9x^2-16-9 x^2+72x-144 =-16\\\\ 72x=-16+144+16\\\\ 72x=144\ \ |:72\\\\x= 2\\\\spr.\\\\(3*2-4)(3*2+4)-9(2-4)^2=-16\\\\2*10-9*4=-16\\\\20-36=-16\\\\-16=-16\\\\L=P[/tex]
