(1) x^2+6x+9=1(x+3)^2=1x+3=±1x=-2 or x=-4(2) x^2+2√5 x +5=0(x+√5)^2=0x+√5=0x=-√5
(1)x^2+6x+9=0(x+3)^2=0x=-3(2)x^2+2√5x + 5 =0(x+ √5)^2=0x=-√5
