Question

Solve for x:
x^2-1=x+1
A. -1
B. -2
C. 2 & -1
D. -1 & -2

Answer 1

C.2&-1

Answer 2

some thing is wrong with this question
x^2-1=x+1 is the same as x^1=x+1
now any number to the power of 1 is its self.
so how must it be equal seeing that 1 is added to x

Answer 3

It would prob. make more sence to you if i put (x^2)-1=x+1. would it not be the same answer this way?

Answer 4

rnoy is right. substitute your choices into the question and see which one solves it.

Answer 5

Ok thank you!