Question

Which strategy is the most appropriate strategy to solve (x−1)^2=9 ?

Answer 1

Answer

Square root property:

If $y^2=b$ then; $y = \sqrt{b}$

Given the equation:

$(x-1)^2=9$

Using square root property;

Then;

$x-1 = \sqrt{9}$

Simplify:

$x-1 = 3$

Add 1 to both sides we have;

$x = 4$

Therefore,  the strategy is the most appropriate strategy to solve $(x-1)^2=9$ is square root property and  the value of x is 4

Answer 2

(x-1)^2=9 <=> x-1=3 <=> x=4