Question

say true or false 7x^2 - 5 = 3 is a linear equation​

Answer 1

Answer:

$2 \times 7 {x}^{2} - 5 = 3 \\ 14 {x}^{2} - 5 = 3 \\ 14 {x}^{2} = 8 \\ {x}^{2} = \frac{8}{14} = \frac{4}{7} \\ x = \frac{2}{ \sqrt{7} }$

that's is your answer