sorry, last one i swear!

please help, thankyou all!

Find the points of intersection between the porabola and line:

y = x^2 + 12x + 24

y = 4x + 9

:confused: !!

i thought i had more brain cells than that!

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- April 22nd 2007, 08:27 PMgeorgiaaa.one last quadratics question!
sorry, last one i swear!

please help, thankyou all!

Find the points of intersection between the porabola and line:

y = x^2 + 12x + 24

y = 4x + 9

:confused: !!

i thought i had more brain cells than that! - April 22nd 2007, 09:00 PMSoroban
Hello, georgiaaa!

Quote:

Find the points of intersection of the parabola and line:

. . y .= .x² + 12x + 24

. . y .= .4x + 9

To find the intersection of two curves, equate the functions.

. . x² + 12x + 24 .= .4x + 9

. . . x² + 8x + 15 .= .0

. . (x + 3)(x + 5) .= .0

And we have: .x = -3, -5

The corresponding values are: .y = -3, -11

Therefore, the intersections are: .(-3,-3) and (-5,-11)

- April 22nd 2007, 09:02 PMJhevon