1.(х+4)^2=x(x+3) 2.10-x(5-(6+x))=x(x+3)-4x
1) x^2+8x+16-x^2-3x=0 5x=-16 x=-3,2 2) 10-x(5-6-x)=x^2+3x-4x 10-x(-1-x)-x^2+x=0 10+x+x^2-x^2+x=0 2x=-10 x=-5