Question 435414
1.)x2-4x+4=(x-2)(x-2)=(x-2)2
2.)p=2L+2W
52=2L+2W
26=L+W
26-W=L
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LXW=160
(26-W)W=160
26W-W2=160
0=W2-26W+160
0=(W-16)(W-10)
The width is 10cm.  The length is 16cm.
*[invoke quadratic "x", 1, -26, 160 ]