Answer:
x = 3.162
Step-by-step explanation:
Your first step is to get x by itself by subtracting 3 from both sides.
3-[tex]x^{2}[/tex] = -7
-[tex]x^{2}[/tex] = -10
Now multiply by both sidex by -1 to make x positive.
[tex]x^{2}[/tex] = 10
now take the square root of both sides.
[tex]\sqrt {x^{2}[/tex] = [tex]\sqrt{10}[/tex]
x = [tex]\sqrt{10}[/tex]
x = 3.162
