Question

Can someone please help me.

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.
Step 1
Step 2
Step 3
Step 4
Is the answer step 2?

Answer 1

Harry kind of fails.

a = 2
b = -1
c = -6

1. x is the negative of -1 (ding) plus/minus the square root of -1^2 (ding) -4*2*-6 (ding), all over 2a (ding). No errors.

Our real question is: What is -4*2*-6? It's 48. Which makes step 3 and 4. wrong, because they both came up with 47.

Answer 2

So step 3 is the correct answer then?

Answer 3

yea, thats what i got:)

Answer 4

ok thank you so much.

Answer 5

yup:D

Answer 6

Thanks for your help but Step 3 was not the answer.

Answer 7

Step 4 :)