Answer:
X=6 x=6
Step-by-step explanation:
[tex]x^{2} +28=64[/tex]
subtract 28
[tex]x^{2} =36[/tex]
Square Root
[tex]\sqrt{x^{2} } =\sqrt{36}[/tex]
Remember + or -
x=6 or -6
Answer:
x=-6, 6
Step-by-step explanation:
Subtract 64 from both sides
x^2-36=0
Uses difference of squares
(x-6)(x+6)
x=-6, 6
