(x+4)^2-(x-5)^2=9 plz solve this for me

(x + 4)^2 - (x - 5)^2 = 9

Expand.

(x + 4)(x + 4) - (x - 5)(x - 5) = 9

FOIL.

x^2 + 4x + 4x + 16 - (x^2 - 5x - 5x + 25) = 9

Distribute -1 to each term inside parentheses.

x^2 + 4x + 4x + 16 - x^2 + 5x + 5x - 25 = 9

Combine like terms.

18x - 9 = 9

Add 9 to both sides.

18x = 18

Divide both sides by 18.

x = 1

r(0,90)(x,y) . t(-5,0)

last option

step-by-step explanation:

∆def to ∆d"e"f"

- rotate 90 counterclockwise degrees

- then translated 5 to the left (x --> x - 5)

answer is the last option

no association

step-by-step explanation:

if you have eyes and you can use them efficiently you can see that it just looks like random dots like do a line of best fit and like they're so spread out it's such a weak association you might as well consider it nonexistent