X2 + 8x + 16 = 10x +16x2 + 8x + 16=2x + 8x + 16=10x + 16
x2 + 8x + 15 = (x + 3)(x + 5)
y = x2 + 8x + 15 = (x + 3)(x + 5). When y = 0, one or other of the two factors must equal zero; that is, x = -3 or -5, when y = 0.
x² + 8x + 15 = (x + 5)(x + 3)
(x2 + 14 + 48 / (x + 8) = (x2 + 62) / (x + 8) =(x2 + 8x - 8x - 64 + 126) / (x + 8) = x - 1 + 126/(x+8)
(x2 - x - 20) / (x2 + 8x + 16) = [(x - 5)(x + 4)] / (x + 4)2 = (x - 5) / (x + 4)
(x + 9)(x - 1)
(x - 3)(x - 5)
X2 + 8x + 16 = 10x +16x2 + 8x + 16=2x + 8x + 16=10x + 16
x2 + 8x + 15 = (x + 3)(x + 5)
x2 + 8x + 15 = (x + 3) (x + 5).
(x + 9)(x - 1)
When factored it is: (x+9)(x-1)
x2 + 8x = x(x+8)
x2-8x+15 = (x-3)(x-5)
x2+8x-5 = 15 x2+8x-20 = 0 (x+4)2-20 = 0 (x+4)2-16-20 = 0 (x+4)2 = 36 x+4 = +/- 6 x = -10 or x =2
x2-8x+12 = (x-2)(x-6) when factored