Question

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

Answer 1

Answer:

-7

Step-by-step 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...

Good luck on your assignment..