What is the expression x + 8x - 9 equivalent to? 1) (x +9)(x + 1)
2) (x + 9)(x - 1)
3) (x - 9)(x + 1)
4) (x – 9)(x - 1)

Step-by-step explanation:

(

+

1

)

+

9

(

+

1

)

x = ± 6i

step-by-step explanation:

x^2 = -36

take the square root of each side

sqrt(x^2) = sqrt(-36)

we know sqrt(ab) = sqrt(a) sqrt(b)

x = ±sqrt(36) sqrt(-1)

we know that sqrt (-1) = i

x = ± 6i

so, converting firstly the mixed fractions to improper fractions and then "adding".