# Homework Help: Quadratic Equation (Check my Workings ?)

1. Dec 5, 2011

### lloydowen

1. The problem statement, all variables and given/known data

Solve using the formula method.

2. Relevant equations

$3t^2+7t=5$

3. The attempt at a solution

$3t^2+7t-5=0 t= \frac{-7 +or-\sqrt{7^2-4(3)(-5)}}{2(3)} t= \frac{-7+\sqrt{109}}{4} t= -4.39$ OR...
$t= \frac{-7-\sqrt{109}}{4} t= -9.61$

The reason I have doubts is because the answer book from the tutor shows, T= 0.573 or -2.907... ? :(

2. Dec 5, 2011

### lloydowen

Ah ****, misuse of the formula tags, :( For some reason it wont let me go back and edit, hope you guys can understnad that :/

3. Dec 5, 2011

### eumyang

In the denominator, 2(3) does not equal 4.

4. Dec 5, 2011

### lloydowen

Oh! Such a silly mistake, I feel like a fool now !

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