[tex]a)\\\\ 3(x^2-2x+3)-2(x^2-5x-1) = 3 x^2-6x+9-2 x^2+10x+2=x^2+4x+11\\\\x=2\\\\x^2+4x+11=2^2+4*2+11=4+8+11=23[/tex]
[tex]b)\\\\ a(2ab+b)-b(a-2ab+a^2) = 2a^2b+ab - ab+2ab^2-a^2b =a^2b+2ab^2\\\\a=0,1\ \ i\ \ b=-10\\\\a^2b+2ab^2=(0,1)^2*(-10)+2*0,1*(-10)^2=0,01*(-10) +0,2*100=\\\\=-0,1+20=19,9[/tex]
