SOLUTION: what is the x-intercept of y=x^2-2x-3?

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Question 427442: what is the x-intercept of y=x^2-2x-3?
Found 2 solutions by John10, ewatrrr:
Answer by John10(297) About Me  (Show Source):
You can put this solution on YOUR website!
When we find the x-intercept (let y =0) and vice versa
x^2 - 2x -3 =0
(x -3)(x + 1)= 0
x= 3 or x = -1
The x-intercept has the form (x,0): (3,0) and (-1,0)
It means that the equation cross the x-axis twice at x = 3 and x = -1

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

x-intercepts (Note: when y = 0) 

y=x^2-2x-3

 x^2-2x-3=0

factoring

(x-3)(x+1)=0

(x-3)=0  x = 3

(x+1)=0  x = -1



x-intercepts: (3,0) and (-1,0)