Question

What method would you choose to solve the

equation 2x2 - 7 = 9? Explain why you chose this
method.

Answer 1

» ◻ Add and divide to isolate x²

`2 {x}^(2) - 7 = 9 \\ 2 {x}^(2) = 9 + 7 \\ 2 {x}^(2) = 16 \\ {x}^(2) = (16)/(2) \\ \\ {x}^(2) = 8`

» ◻ use the square root property of equality

`{x}^(2) = 8 \\ x = √(8)`