$x^2 + 10x + 25 = 0$; $x=-5$

$(3x - 7)^2 = 49$; $x=\frac{14}{3},x=0$

$4x^2 - 12x + 9 = 0$; $x=\frac{3}{2}$

$x(x - 5) + 6 = 0$; $x=2,x=3$