Prime factor 4x^2-81=0
Either one of these x = 9/2 = 4.500 x = -9/2 = -4.500
Answer:
\(4 {x}^{2} - 81 = 0 \\ 4 {x}^{2} = 81 \\ {x}^{2} = \frac{81}{4} \\ x = \sqrt{ \frac{81}{4} } \\ x = \frac{9}{2} \\ {x = 4.5}\)
