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

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apoorvkBest ResponseYou've already chosen the best response.1
First of all, do you know what the quadratic formula is?
 one year ago

careless850Best ResponseYou've already chosen the best response.1
I wrote this problem out 6 times, still can't see WHERE he went wrong.
 one year ago

apoorvkBest ResponseYou've already chosen the best response.1
What are you corresponding 'a', 'b' and 'c' for this quadratic when you compare it with the standard equation of a quadratic "ax^2 + bx +c=0"?
 one year ago

careless850Best ResponseYou've already chosen the best response.1
A = 2. B = 1. C = 6.
 one year ago

careless850Best ResponseYou've already chosen the best response.1
\[1 \pm \sqrt{1^{2}}  4*2*6\]
 one year ago

careless850Best ResponseYou've already chosen the best response.1
12 * 4 = 48. 1*1 = 1. \[1 \pm \sqrt{148 } \div 2\]
 one year ago

careless850Best ResponseYou've already chosen the best response.1
He + instead of .
 one year ago

apoorvkBest ResponseYou've already chosen the best response.1
Should be : \[x = \frac{(1) \pm \sqrt{(1)^2  4 \times 3 \times (6) }{} }{2\times 2 }\]
 one year ago

apoorvkBest ResponseYou've already chosen the best response.1
actually the second step itself ha the error. (1)^2 = 1 and yes that would be 4*2*6 > typo my bad.
 one year ago

careless850Best ResponseYou've already chosen the best response.1
So, it's step 2, right?
 one year ago

careless850Best ResponseYou've already chosen the best response.1
I have one more question.
 one year ago

apoorvkBest ResponseYou've already chosen the best response.1
And please ask questions in the correct subject forum :)
 one year ago

apoorvkBest ResponseYou've already chosen the best response.1
Sure, just post it as a new one!
 one year ago

careless850Best ResponseYou've already chosen the best response.1
Oh wow, I didn't realize I was in biology
 one year ago
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