SOLUTION: Please help me solve this equation: 3x^2 - 2x = 12.
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Question 242990: Please help me solve this equation: 3x^2 - 2x = 12.
Found 2 solutions by josmiceli, unlockmath:
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Subtract from both sides
Now this is in the general form
Now apply the quadratic formula
where
The answers are:
and
It's a difficult process, but you can plug
these answers (one at a time) back into the
original equation and see if they work
Answer by unlockmath(1688) (Show Source): You can put this solution on YOUR website!
Hello,
Let's first get this equation to equal zero.
3x^2 - 2x -12 = 0
The way to solve this is with the quadratic formula which will look like:
{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }
Now plug in the values will be:
{x = (-(-2)b +- sqrt( 4-4*3*(-12) ))/(2*3) }Do the calculations:
{x = (2 +- sqrt( 148 ))/(6) } Now sq root 148
{x = (2 +- 12.17/6 } So we have 2 answers
x= 2.36 (Rounded off)
x= -1.695
Check these out by using the answer in the original equation.
RJ Toftness
Check out my book at www.math-unlock.com
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