PDA

View Full Version : quadratic formula: can it be used to solve x^2 = 3?



nae
07-05-2006, 10:44 AM
The quadratic formila cannot be used to solve the following: x^2=3 true or false
i say it's true because there's no way you can use the qudratic formula.

Is this correct.

royhaas
07-05-2006, 11:03 AM
Guess again: x^2-3=0.

TchrWill
07-05-2006, 01:57 PM
The quadratic formila cannot be used to solve the following: x^2=3 true or false
i say it's true because there's no way you can use the qudratic formula.

Is this correct
x^2 + bx + c = 0

In your case b = q0q.

x = [-b+/-sqrt(0 + 12)]/2

x = =/-sqrt3/2 = 1.73205

Denis
07-05-2006, 02:43 PM
x = =/-sqrt3/2 = 1.73205

So you don't get confused (TchrWill forgot a "2"):

x = +/- 2sqrt(3) / 2

jonboy
07-06-2006, 11:28 AM
As long as a is not equal to zero and can be expressed using ax^2+bx+c=0 then it can be solved by using the Quadratic Formula.