answer for this question IS x =plus or minus root Y - 7
Answer:
D
Step-by-step explanation:
Given
y = x² + 7 ← isolate x² by subtracting 7 from both sides
y - 7 = x² ← take the square root of both sides
[tex]\sqrt{x^2}[/tex] = ± [tex]\sqrt{y-7}[/tex], hence
x = ± [tex]\sqrt{y-7}[/tex] → D
