It is: (x+3)(x+4) when factored
(x+7)(x+12)
(x + 12)(x + 7)
(x - 12)(x - 7)
if x2 + 7 = 37, then x2 = 29 and x = ±√29
(x2 + 14x + 49) = (x + 7)2
x2 + 2x -6 = 0 x2 + 2x + 1 = 7 (x + 1)2 = 7 x = -1 ± √7
x2+14x+49 = (x+7)(x+7) when factored
-x2 + x + 42 = -[x2 - x - 42] = -[x2 - 7x + 6x - 42] = -[x*(x - 7) + 6*(x - 7)] = -(x - 7)*(x + 6)
x2 - 14x + 49(x - 7) (x - 7)
(x2+10x+21)/(x+3) = (x+7)
x2+6x-7 = (x+7)(x-1) when factored
x2 + 10x + 21 = (x + 3)(x + 7)