Question

Please help!!? Medal will be REWARDED!:)

Solve the inequality: (x + 3)(x - 5) > 0.
A. x < -3 or x > 5
B. x < -5 or x > 3
C. -3 < x < 5
D. -5 < x < 3

Answer 1

@jim_thompson5910

Answer 2

Set up a sign chart first

Answer 3

each number on that chart makes (x + 3)(x - 5) equal to zero

Answer 4

You just need to test values that lie in the regions between (or to the left/right) of each marker

Answer 5

I got C for an answer

Answer 6

one sec

Answer 7

it's not C

Answer 8

pick a number between -3 and 5

0 is a good number to pick

(x + 3)(x - 5) > 0

(0 + 3)(0 - 5) > 0

(3)(-5) > 0

-15 > 0

which is FALSE

Answer 9

so -3 < x < 5 is NOT part of the solution set

Answer 10

so would you say that D would be our answer?

Answer 11

no D isn't it either

Answer 12

the endpoints are flipped in sign and value, it's just way off

Answer 13

oh so it must be B?

Answer 14

look at the sign chart

Answer 15

which values am I using?

Answer 16

the X value

Answer 17

which values am I using here

Answer 18

-3, 5

Answer 19

so that's why it's not B

Answer 20

so it has to be A

Answer 21

alright which leads our answer to A obviously lol:)