View Full Version : Algebra
Marvin666
December 5th, 2009, 07:47 PM
I'm taking algebra 1, but cant figure out this problem. I need to solve for x in the following:
(16/9*X)^2+x^2=299.29
soni1770
December 5th, 2009, 07:54 PM
hey, don't post your homework.....:popcorn:
x = 8.491
underquark
December 5th, 2009, 08:02 PM
or -8.491
Tmi
December 5th, 2009, 08:09 PM
I'm taking algebra 1, but cant figure out this problem. I need to solve for x in the following:
(16/9*X)^2+x^2=299.29
First use that (ab)^2 = a^2 * b^2
(16/9 * x)^2 is thus (16/9)^2 * x^2. After this you can solve for x
(16/9*X)^2+x^2=299.29 <-> (16/9)^2*x^2 + x^2 = 299.29 <-> x^2 * ((16/9)^2+1)=299.29 <-> x^2 = 299.29 / ((16/9)^2+1) <-> x = +- sqrt(299.29 / ((16/9)^2+1))
Marvin666
December 5th, 2009, 08:18 PM
Thanks, and I only do homework during study hall. I was figuring out a screens dimensions from it's diagonal and aspect ratio.
17.3" 16:9 = 15.095..." x 8.491"
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