deedee28 Group Title help me solve this problem by quadratic formula: y^2+7y-6=0 2 years ago 2 years ago

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1. lgbasallote Group Title

quadratic formula is $\large y = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$ do you know which is a, b and c in your problem?

2. deedee28 Group Title

a=1, b=7, c=-6

3. deedee28 Group Title

so, i plugged in the numbers and I got 7+- the square root of 53 over 2...I do not think that is right.

4. i<3science Group Title

Go back and recheck your formula. You probably forgot to attach your negative sign to b.

5. i<3science Group Title

6. deedee28 Group Title

okay, -7+- the square root of 73, over 2.

7. deedee28 Group Title

did I get that right this time?

8. i<3science Group Title

yes :) good job!