(a + b)(a - b)
a5+b5 = (a+b) (a4-a3b+a2b2-ab3+b4)
The GCF is a2b.
The GCF is a2b
Expand 4ab3 (a2b2-a-1)
It is a2b.
Because a radical has two solutions, the positive and negative. This means that √(a2b2) has twice as many solutions as ab. ab is in fact a subset of √(a2b2).
a^2b^2(4ab) = 8a^3b^3.
it's something 4 sure!
Yes, 8100 = 90^2. As to if you want to know why. Maybe you just want to see how you can tell. A number a2b2 will equal (ab)2. So if any two perfect squares are multiplied together, the product is also a perfect square. With a = 9, and b = 10, then you have a2 = 81, and b2 = 100. And a2b2 = (ab)2 = 8100.
If it does not factor properly then you cannot factor it.
It would be a Sun Protection Factor factor! (A bit like PIN number).
The common factor would be n.