Question

The x-intercepts of a parabola are 5 and -7. What is the equation of the axis of symmetry?

Answer 1

help please

Answer 2

how wud i get the ans

Answer 3

(x-5)(x+7) = 0

Answer 4

You can use that to at least get the parabola. After that, you have to complete the square

Answer 5

how though

Answer 6

can yu show me the steps please.

Answer 7

x^2+2x-35 = 0
x^2+2x = 35
x^2+2x+1 = 35+1
(x+1)^2 = 36

Answer 8

You really didn't need to do all of that however

Answer 9

since the vertex is halfway between the intercepts:

add them up and divide by 2

Answer 10

amistre, I was getting to that

Answer 11

so 7+5/2

Answer 12

?

Answer 13

there is no +5 in there :)

Answer 14

but heros got it

Answer 15

symetry means : same on both sides; so if your in the middle your symetric

Answer 16

Actually, for that equation, I think they want you to write

y = (x+1)^2 - 36

Answer 17

nah, x=-1 is it

Answer 18

the eq for the axis of sym

Answer 19

Oops, well in that case

(5-7)/2