To evaluate it you need to know both b and a. But it is possible to factorise it as follows:
b2-a2 = (b-a)*(b+a)
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No, unless "a" happens to be equal to 0, or to 1.
The formula for finding the angles is called " Pythagorean Thyrum " It states that a squred plus b squared equals c squared so therefore c squared minus a squared will equal b squared. i hope that helps
a=b=3.60555
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