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5 Comments Already

mygif
alisabyrne Said,
February 2nd, 2011 @12:23 pm  

highest power must be 2

mygif
packers Said,
February 2nd, 2011 @12:49 pm  

X= -b+or- the square root of b squared minus 4ac over 2a

mygif
allistar34 Said,
February 2nd, 2011 @12:55 pm  

You can’t use the quadratic formula/completeing the square/factoring/graphic, because it’s not a quadratic. A quadratic’s highest exponent is 2. Therefore, this equation is a not a quadratic, it’s a cubic.

mygif
Mrs. H Said,
February 2nd, 2011 @1:46 pm  

7x^2 + 12x – 3 = 0 I think you mean this??
a = 7
b = 12
c = -3

-12+- the squrt of (12^2 – 4(7)(-3) / 2(7)
-12 plus/minus the squrt of 144 + 84 / 14
-12 plus/minus the sqrt of 288/14
-12 + 15.10 / 14
x= 0.2214
AND
-12 – 15.10/14
x = -1.936

mygif
Chester P Said,
February 2nd, 2011 @1:56 pm  

In this case, the formula is a bit more complex…

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