Can anyone please help me with an algebra assignment: Solve X^2 + 2x - 3 = 0 by graphing I just can't figure out how to do this please help.

Question

anonymous · Answer

you can factor this one i think

ytry · Answer

I forgot to post that it says solve by graphing

anonymous · Answer

try 
$$(x+3)(x-1)=0$$ then set each factor = 0 and solve

anonymous · Answer

it is easier to graph if you know the zeros and the vertex
the zeros are at $x=-3$ and $x=1$ so you know it crosses the $x$ axis there
the vertex is half way between those two numbers, at $x=-1$ 
replace $x$ by $-1$ and find $y=-4$ so you know another point on the graph, where theparabola sits at $(-1,-4)$

anonymous · Answer

here is a nice picture that shows a graph of the function
you can see the zeros and the vertex

anonymous · Answer

http://www.wolframalpha.com/input/?i=y%3Dx^2+%2B+2x+-+3+

ytry · Answer

Thank you so much