how do you go about finding what the x intercepts are? (which are -2.4, 0.4, and 2)...and furthermore, how to graph it? . I can't figure this out and it is driving me crazy. Thanks.
Three answers:
anonymous
2007-12-12 22:40:35 UTC
set equal to zero
anonymous
2007-12-12 22:50:16 UTC
get a graphic calculator. i'm sure schools allow it for low level classes.
To solve the roots algebraically, you'd have to take a course known as numerical analysis, which is kind of very advanced for you at this stage. They'll teach approximation methods like newton's method, false position, bisection method, etc etc
Graphing calculator should graph and compute roots too.
Roots are where the graph intersects the x axis, i.e. y=0. Your answers are NOT CORRECT.
if x = 0, then y = sqrt(2) which is clearly not an x intercept.
Happy Goat
2007-12-12 22:46:46 UTC
It is all in the square root my friend, your over thinking this one.
x^3 - x + 7 = y
3x + 7y = 56
x + y = 28
Okay I give up.. I can't remember this stuff, I'm too old.
Mixing numbers and letters into equations is like mixing alcohol and fire into a teenagers life
Thats all I know
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