Question

Tessa solves the equation below by first squaring both sides of the equation HELP PLEASE

Answer 1

-7

Explanation:

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Answer 2

-7

Explanation:

`\sqrt{ {x}^(2) - 3x - 6} = x - 1`

Squaring on both sides:

`{x}^(2) - 3x - 6 = {(x - 1)}^(2)`

Use the formula:
`{(a - b)}^(2) = {a}^(2) - 2ab + {b}^(2)`

`{x}^(2) - 3x - 6 = {x}^(2) - 2x + 1`

Combine like terms.

`{x}^(2) - {x}^(2) - 3x + 2x = 1 + 6`

`- 3x + 2x = 7`

Calculate

`- x = 7`

`x = - 7`

Hope this helps...

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