Question

Harry is trying to solve the equation y = 2x2 − x − 6 using the quadratic formula. He has made an error in one of the steps below. Find the step where Harry went wrong.

Image Links:
Step1:https://www.connexus.com/content/media/527934-762011-102332-AM-68529973.png

Step2:https://www.connexus.com/content/media/527934-762011-102443-AM-872996055.png

Step3:https://www.connexus.com/content/media/527934-762011-102530-AM-1570414991.png

Step4:https://www.connexus.com/content/media/527934-762011-102825-AM-534049823.png

A. Step 1
B. Step 2
C. Step 3
D. Step 4

I think the answer is A?

Answer 1

Step 1 is correct.

Answer 2

As in Harry did step one correctly.

Answer 3

It is in step 2 he made a mistake. Harry calculated \((-1)^2 =-1\) when he should have calculated \((-1)^2=1\)

Answer 4

thank you! :)