Mitchell solved a quadratic equation. His work is shown below.

In which step did Mitchell make an error?
5(x−2)² +6=86

5(x−2)²=80 Step 1

(x−2)²=16 Step 2

x²-2²=16 Step 3

x²=20 Step 4

x=±√20 Step 5

Step 3

Step-by-step explanation:

(a - b)² is not a² - b².

Should have done:

Square root both sides after step 2

binomial distribution

median= 2

range = 7-0 = 7

how to find median?

no. of term=28

median=(28+1)/2=14.5th term

the 14th and 15th term are 2, therefore the median is (2+2)/2 = 2

the square root of what number? if you add that, then someone will probably answer the question.