In which step did Cyrus make an error?

7 7 (x - 1)² = 12

(x - 1)2 = 36 Step 1

I-1= 6

Step 2

I=7

Step 3

In step 2 Cyrus make an error.

Step-by-step explanation:

Given : Expression

To find : In which step did Cyrus make an error?

Solution :

Expression

Step 1 -

Step 2 -

Step 3 -

There is a mistake in step 2,

As we are taking root both side so RHS value is +6 and -6.

So that there are two solutions of the equation.

Correct steps are,

Step 2 -

Step 3 -

Therefore, In step 2 Cyrus make an error.

step-by-step explanation: given equation a = h(b 1+b 2)

also we are given values of a, h and b 1 as :

a = 16, h = 4, and b 1 = 3.

in order to solve it for b 2, we need to plug the given values of   a, h and b 1 .

therefore, plugging values of   a, h and b 1   in given equation, we get

16 = 4( 3 + b 2)

first dividing both sides by 4, we get

4 = 3 + b 2

subtracting 3 from both sides, we get

4 -3 = 3 -3 + b 2

1 = b 2.