Question

please tell the anwer of it and please tell step by step​

Answer 1

STEP-BY-STEP SOLUTION:

Take the square root of each side of the equation to set up the solution for x

(x – 1)^2 ½ = ± √20

Remove the perfect root factor x – 1 under the radical to solve for x.

x – 1 = ± √20

Simplify the right side of the equation.

x – 1 = ± 2√5

The complete solution is the result of both the positive and negative portions of the solution.

x = 2√5 + 1, –2√5 +1

The result can be shown in multiple forms.

Exact Form:

x = 2√5 + 1, –2√5 + 1

Decimal Form:

x = 5.47213595... , –3.47213595...