Answer:
X = ±5
Step-by-step explanation:
X^2 - 9 = 16
Add 9 to each side
X^2 - 9+9 = 16+9
X^2 = 25
Take the square root of each side
sqrt(X^2 ) =±sqrt(25)
X = ±5
Answer:
5
Step-by-step explanation:
[tex]x^{2} -9=16\\ x^{2} =16+9\\\sqrt{x} ^{2} =\sqrt{25\\[/tex]
[tex]\sqrt{25} = 5[/tex]
