Respuesta :
Answer:
(x+3)(x-3)
Step-by-step explanation:
When factoring x^2-9 you'd look for square multiples of -9.
Because 3×3 is 9, 3 is your square. You can't just use (x+3) because your outcome is a -9. Which is why your answer would be (x+3)(x-3)
Answer
(x-3)(x+3)
Explanation:
X^2-9 is a difference of squares
You can check it by FOIL
X times X = x^2
x times 3= 3x
-3 times x= -3x
-3 times 3=-9
Add it together : x^2 + 3x-3x-9
You get: x^2-9
(x-3)(x+3)
Explanation:
X^2-9 is a difference of squares
You can check it by FOIL
X times X = x^2
x times 3= 3x
-3 times x= -3x
-3 times 3=-9
Add it together : x^2 + 3x-3x-9
You get: x^2-9
