Aleg. 2 help?

0 ⤊

1. What is the axis of symmetry of a parabola with the equation:
Y=X^2 + 2X - 15

2. what is the solution of: 1/8(x - 3)^2=5

Thanks

2007-12-13 08:04:29 · 2 answers · asked by Ashers 1 in Science & Mathematics ➔ Mathematics

y=x^2 +2x -15
y= (x+5)(x-3)
zeroes at x= -5, 3

so symmetry at x=-1

1/8(x-3)^2 =5
(x-3)^2 = 5 * 8

(x-3) = √40
x= √40 + 3

2007-12-13 08:12:23 · answer #1 · answered by ¿ /\/ 馬 ? 7 · 0⤊ 0⤋

use the formula

Y(x-x0) = Y(x+x0)

solve for x0

2007-12-13 08:10:52 · answer #2 · answered by Nur S 4 · 0⤊ 0⤋