Question

Which statement about the following equation is true? 2x2 – 9x 2 = –1

Answer 1

`{2x}^(2) - {9x}^(2) = - 1`

`{ - 7x}^(2) = - 1`

`{x}^(2) = - 7 * - 1`

`{x}^(2) = 7`

`x = √(7)`