# Math Help - sloving for x

1. ## sloving for x

can someone help me solve for x, thanks!

4.8 = (1.2 + 2x/2)^2/(.30 - x/2)

i have tried to mult. 4.8 with (.30 - x/2) but doesnt get the correct numbers.

2. Originally Posted by jsu03
can someone help me solve for x, thanks!

4.8 = (1.2 + 2x/2)^2/(.30 - x/2)

i have tried to mult. 4.8 with (.30 - x/2) but doesnt get the correct numbers.
Hi jsu03,

$4.8=\dfrac{\left(1.2+\dfrac{2x}{2}\right)^2}{\left (.30-\dfrac{x}{2}\right)}$

That piece where $\frac{2x}{2}$ bothers me. If this is, in fact, your equation, it all boils down to

$x = 0$.

3. Oh no, the 1.2 + 2x is all over 2 : ((1.2 + 2x )/ 2)^2 and so is the
((.30 - x)/2)

4. Originally Posted by jsu03
Oh no, the 1.2 + 2x is all over 2 : ((1.2 + 2x )/ 2)^2 and so is the
((.30 - x)/2)
Parentheses are good!

Okay, your equation is $4.8= \frac{((1.2+ 2x)/2)^2}{.3- x/2}$. If you go ahead and multiply boht sides by .3- x/2 as you say, you get $1.44- 2.4x= \left(\fra{1.2+ 2x}{2}\right)^2= \frac{(1.2+ 2x)^2}{4}$.

You might as well go ahead and multiply both sides by 4 as well:
[tex]5.76- 9.6x= (1.2+ 2x)^2]/math]

Now multiply out that right side:
5.76- 9.6x= 1.44+ 4.8x+ 4x^2
.

Solve that quadratic equation for x. Don't forget to put the answers back into the origin