Question

ACT Question: If x < 0 and (x+3)(x+1)=8, then x^2=
A. -5
B. 2
C. 4
D. 5
E. 25

Answer 1

Though it would takes times, if I were you, I will just have (x+3)(x+1)=8 to a^2+bx+c = 0 form, then I'd try to factor it first, if failed, then use quadratic formula

Answer 2

I get (x+5)(x-1)

Answer 3

do they just want me to use any of the two x's? that's what confuses me sometimes lol

Answer 4

because the correct answer is E.25 so I guess I just needed to use 5?

Answer 5

oops nvm I think I am more confused lol

Answer 6

(x+5)(x-1) = 0, so what is x?

Answer 7

x=-5, x=1 ?

Answer 8

ooooh they say x<0

Answer 9

Yes, now read question, you do notice what x have to be?

Answer 10

yeah, so x have to be -5 only

Answer 11

So x^2 = (-5)^2 = 25

Answer 12

yeah ^_^ thanks <3

Answer 13

welcome!