posted by -Untamed- .
Solve the following quadratic equation(as exact values) using the quadratic formula.
I got 5+-2sqrt10/2.
^ Sorry hard to write it out. But basically there is a 5 there, the negative sign is supposed to be under the positive sign, then there is a two outside of the radicand, and inside the radicand is 10, all under 2.
The answer is correct if it was meant to be, after cancelling the two's:
The answer is correct if it was meant to be (without the 2 in the denominator):
Where does that two in the denominator go? Since it has to cancel out with all terms.
You may have (like I did) subtracted 4ac (and got 40) instead of adding to get 160.