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HELP!! ¶hR^2-¶hr^2?

completely factor the given expression ( Leave ¶ as ¶ )
¶ is pi

2007-10-28 08:52:02 · 1 answers · asked by jammesun 1 in Science & Mathematics ➔ Mathematics

please explain how this works

2007-10-28 09:13:30 · update #1

1 answers

¶hR^2-¶hr^2
= ¶h(R^2-r^2)
=¶h(R-r)(R+r)

2007-10-28 08:58:06 · answer #1 · answered by ironduke8159 7 · 0⤊ 0⤋

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