Question

Factor x2 - 8x + 9. (4 points)

(x - 9)(x - 1)
(x + 9)(x + 1)
Prime
(x + 9)(x - 1)

Answer 1

\[x^2 - 8x + 9\]

So, basically, what factors when added have a sum of 8 and a product of 9?

Answer 2

\[(x \pm ?)(x \pm ?)\]

Answer 3

x+9 x- 1 ??

Answer 4

\[(x + 9)(x - 1) = x^2 - x + 9x - 9 = x^2 + 8x - 9\]

Answer 5

._.

Answer 6

8 and 9 have no summation and products. There, it is prime.

Answer 7

oh.... Thanks!