y = sqrt(x)
y = x - 6

I'm getting that they intersect at (4, 2) and (9, 3), but when you look on a grapher it doesn't look like it... especially (4,2).... plus it doesn't make sense for them to intersect twice when you think about it...

 

ihaveaquestion,

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y = sqrt(x)
y = x - 6

I'm getting that they intersect at (4, 2) and (9, 3), but when you look on a grapher it doesn't look like it... especially (4,2).... plus it doesn't make sense for them to intersect twice when you think about it...

I get (9,3) and (4,-2) . You introduced another solution when you squared the top equation to get y^2=x . So the (4,-2) solution is rejected because sqrt(4) does not equal -2 .

Ratch

 

i see, got it