Question 848557
Joe's rectangular garden is 6 meters long and 4 meters wide. She plans to double the area of the garden by increasing each side by the same amount. Find the number of meters by which each dimension must be increased.
And this is what I have wrote so far:
Area - 24
lxw
6x4=24
----------
Use * for multiply, not x
x is used for other things.
============
L*W = 24 = 4*6
Add x meters to each side
(4+x)*(6+x) = 24*2 = 48
{{{x^2 + 10x + 24 = 48}}}
{{{x^2 + 10x - 24 = 0}}}
(x - 2)*(x + 12) = 0
x = -12  (Ignore)
-------
x = 2 meters